Porting "Refactors language holder"

2020-05-08 22:44:02 +02:00
parent 602154abe8
commit 2858ddd90b
62 changed files with 592 additions and 388 deletions
--- a/code/__DEFINES/language.dm
+++ b/code/__DEFINES/language.dm
@@ -3,5 +3,24 @@
 #define LANGUAGE_HIDE_ICON_IF_UNDERSTOOD 4
 #define LANGUAGE_HIDE_ICON_IF_NOT_UNDERSTOOD 8

-#define LANGUAGE_KNOWN "language_known"
-#define LANGUAGE_SHADOWED "language_shadowed"
+// LANGUAGE SOURCE DEFINES
+#define LANGUAGE_ALL 			"all"		// For use in full removal only.
+#define LANGUAGE_ATOM 			"atom"
+#define LANGUAGE_MIND 			"mind"
+
+#define LANGUAGE_ABSORB			"absorb"
+#define LANGUAGE_APHASIA		"aphasia"
+#define LANGUAGE_BLOODSUCKER	"bloodsucker"
+#define LANGUAGE_CLOCKIE		"clockie"
+#define LANGUAGE_CULTIST		"cultist"
+#define LANGUAGE_CURATOR 		"curator"
+#define LANGUAGE_DEVIL			"devil"
+#define LANGUAGE_GLAND			"gland"
+#define LANGUAGE_HAT 			"hat"
+#define LANGUAGE_HIGH			"high"
+#define LANGUAGE_MALF			"malf"
+#define LANGUAGE_MASTER			"master"
+#define LANGUAGE_SOFTWARE		"software"
+#define LANGUAGE_STONER			"stoner"
+#define LANGUAGE_VASSAL			"vassal"
+#define LANGUAGE_VOICECHANGE	"voicechange"
--- a/code/datums/brain_damage/imaginary_friend.dm
+++ b/code/datums/brain_damage/imaginary_friend.dm
@@ -91,7 +91,6 @@

 	trauma = _trauma
 	owner = trauma.owner
-	copy_known_languages_from(owner, TRUE)

 	setup_friend()

--- a/code/datums/brain_damage/severe.dm
+++ b/code/datums/brain_damage/severe.dm
@@ -26,21 +26,15 @@
 	scan_desc = "extensive damage to the brain's language center"
 	gain_text = "<span class='warning'>You have trouble forming words in your head...</span>"
 	lose_text = "<span class='notice'>You suddenly remember how languages work.</span>"
-	var/datum/language_holder/prev_language
-	var/datum/language_holder/mob_language

 /datum/brain_trauma/severe/aphasia/on_gain()
-	mob_language = owner.get_language_holder()
-	prev_language = mob_language.copy()
-	mob_language.remove_all_languages()
-	mob_language.grant_language(/datum/language/aphasia)
+	owner.add_blocked_language(subtypesof(/datum/language/) - /datum/language/aphasia, LANGUAGE_APHASIA)
+	owner.grant_language(/datum/language/aphasia, TRUE, TRUE, LANGUAGE_APHASIA)
 	..()

 /datum/brain_trauma/severe/aphasia/on_lose()
-	mob_language.remove_language(/datum/language/aphasia)
-	mob_language.copy_known_languages_from(prev_language) //this will also preserve languages learned during the trauma
-	QDEL_NULL(prev_language)
-	mob_language = null
+	owner.remove_blocked_language(subtypesof(/datum/language/), LANGUAGE_APHASIA)
+	owner.remove_language(/datum/language/aphasia, TRUE, TRUE, LANGUAGE_APHASIA)
 	..()

 /datum/brain_trauma/severe/blindness
--- a/code/datums/diseases/advance/symptoms/voice_change.dm
+++ b/code/datums/diseases/advance/symptoms/voice_change.dm
@@ -30,7 +30,6 @@ Bonus
 	symptom_delay_max = 120
 	var/scramble_language = FALSE
 	var/datum/language/current_language
-	var/datum/language_holder/original_language
 	threshold_desc = list(
 		"Transmission 14" = "The host's language center of the brain is damaged, leading to complete inability to speak or understand any language.",
 		"Stage Speed 7" = "Changes voice more often.",
@@ -48,9 +47,6 @@ Bonus
 		symptom_delay_max = 85
 	if(A.properties["transmittable"] >= 14) //random language
 		scramble_language = TRUE
-		var/mob/living/M = A.affected_mob
-		var/datum/language_holder/mob_language = M.get_language_holder()
-		original_language = mob_language.copy()

 /datum/symptom/voice_change/Activate(datum/disease/advance/A)
 	if(!..())
@@ -64,12 +60,10 @@ Bonus
 			if(ishuman(M))
 				var/mob/living/carbon/human/H = M
 				H.SetSpecialVoice(H.dna.species.random_name(H.gender))
-				if(scramble_language)
-					H.remove_language(current_language)
+				if(scramble_language && !current_language)	// Last part prevents rerolling language with small amounts of cure.
 					current_language = pick(subtypesof(/datum/language) - /datum/language/common)
-					H.grant_language(current_language)
-					var/datum/language_holder/mob_language = H.get_language_holder()
-					mob_language.only_speaks_language = current_language
+					H.add_blocked_language(subtypesof(/datum/language) - current_language, LANGUAGE_VOICECHANGE)
+					H.grant_language(current_language, TRUE, TRUE, LANGUAGE_VOICECHANGE)

 /datum/symptom/voice_change/End(datum/disease/advance/A)
 	..()
@@ -77,7 +71,5 @@ Bonus
 		var/mob/living/carbon/human/H = A.affected_mob
 		H.UnsetSpecialVoice()
 	if(scramble_language)
-		var/mob/living/M = A.affected_mob
-		M.copy_known_languages_from(original_language, TRUE)
-		current_language = null
-		QDEL_NULL(original_language)
+		A.affected_mob.remove_blocked_language(subtypesof(/datum/language), LANGUAGE_VOICECHANGE)
+		A.affected_mob.remove_all_languages(LANGUAGE_VOICECHANGE)	// In case someone managed to get more than one anyway.
--- a/code/datums/dna.dm
+++ b/code/datums/dna.dm
@@ -355,6 +355,11 @@
 		var/datum/species/old_species = dna.species
 		dna.species = new_race
 		dna.species.on_species_gain(src, old_species, pref_load)
+		if(ishuman(src))
+			qdel(language_holder)
+			var/species_holder = initial(mrace.species_language_holder)
+			language_holder = new species_holder(src)
+		update_atom_languages()

 /mob/living/carbon/human/set_species(datum/species/mrace, icon_update = TRUE, pref_load = FALSE)
 	..()
--- a/code/datums/mind.dm
+++ b/code/datums/mind.dm
@@ -85,8 +85,7 @@

 /datum/mind/proc/get_language_holder()
 	if(!language_holder)
-		var/datum/language_holder/L = current.get_language_holder(shadow=FALSE)
-		language_holder = L.copy(src)
+		language_holder = new (src)

 	return language_holder

@@ -101,9 +100,6 @@
 		if(iscarbon(current))
 			var/mob/living/carbon/C = current
 			C.disable_intentional_combat_mode(TRUE)
-	if(!language_holder)
-		var/datum/language_holder/mob_holder = new_character.get_language_holder(shadow = FALSE)
-		language_holder = mob_holder.copy(src)

 	if(key)
 		if(new_character.key != key)					//if we're transferring into a body with a key associated which is not ours
@@ -131,6 +127,7 @@
 	transfer_martial_arts(new_character)
 	if(active || force_key_move)
 		new_character.key = key		//now transfer the key to link the client to our new body
+	current.update_atom_languages()

 //CIT CHANGE - makes arousal update when transfering bodies
 	if(isliving(new_character)) //New humans and such are by default enabled arousal. Let's always use the new mind's prefs.
--- a/code/datums/mutations/speech.dm
+++ b/code/datums/mutations/speech.dm
@@ -277,10 +277,10 @@

 /datum/mutation/human/stoner/on_acquiring(mob/living/carbon/human/owner)
 	..()
-	owner.grant_language(/datum/language/beachbum)
-	owner.remove_language(/datum/language/common)
+	owner.grant_language(/datum/language/beachbum, TRUE, TRUE, LANGUAGE_STONER)
+	owner.add_blocked_language(subtypesof(/datum/language) - /datum/language/beachbum, LANGUAGE_STONER)

 /datum/mutation/human/stoner/on_losing(mob/living/carbon/human/owner)
 	..()
-	owner.grant_language(/datum/language/common)
-	owner.remove_language(/datum/language/beachbum)
+	owner.remove_language(/datum/language/beachbum, TRUE, TRUE, LANGUAGE_STONER)
+	owner.remove_blocked_language(subtypesof(/datum/language) - /datum/language/beachbum, LANGUAGE_STONER)
--- a/code/game/atoms_movable.dm
+++ b/code/game/atoms_movable.dm
@@ -11,7 +11,7 @@
 	var/throw_range = 7
 	var/mob/pulledby = null
 	var/initial_language_holder = /datum/language_holder
-	var/datum/language_holder/language_holder
+	var/datum/language_holder/language_holder	// Mindless mobs and objects need language too, some times. Mind holder takes prescedence.
 	var/verb_say = "says"
 	var/verb_ask = "asks"
 	var/verb_exclaim = "exclaims"
@@ -502,88 +502,94 @@
 		animate(src, pixel_y = initial(pixel_y), time = 10)
 		setMovetype(movement_type & ~FLOATING)

-/* Language procs */
-/atom/movable/proc/get_language_holder(shadow=TRUE)
-	if(language_holder)
-		return language_holder
-	else
+
+/* 	Language procs
+*	Unless you are doing something very specific, these are the ones you want to use.
+*/
+
+/// Gets or creates the relevant language holder. For mindless atoms, gets the local one. For atom with mind, gets the mind one.
+/atom/movable/proc/get_language_holder(get_minds = TRUE)
+	if(!language_holder)
 		language_holder = new initial_language_holder(src)
-		return language_holder
+	return language_holder

-/atom/movable/proc/grant_language(datum/language/dt, body = FALSE)
-	var/datum/language_holder/H = get_language_holder(!body)
-	H.grant_language(dt, body)
+/// Grants the supplied language and sets omnitongue true.
+/atom/movable/proc/grant_language(language, understood = TRUE, spoken = TRUE, source = LANGUAGE_ATOM)
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.grant_language(language, understood, spoken, source)

-/atom/movable/proc/grant_all_languages(omnitongue=FALSE)
-	var/datum/language_holder/H = get_language_holder()
-	H.grant_all_languages(omnitongue)
+/// Grants every language.
+/atom/movable/proc/grant_all_languages(understood = TRUE, spoken = TRUE, grant_omnitongue = TRUE, source = LANGUAGE_MIND)
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.grant_all_languages(understood, spoken, grant_omnitongue, source)

+/// Removes a single language.
+/atom/movable/proc/remove_language(language, understood = TRUE, spoken = TRUE, source = LANGUAGE_ALL)
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.remove_language(language, understood, spoken, source)
+
+/// Removes every language and sets omnitongue false.
+/atom/movable/proc/remove_all_languages(source = LANGUAGE_ALL, remove_omnitongue = FALSE)
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.remove_all_languages(source, remove_omnitongue)
+
+/// Adds a language to the blocked language list. Use this over remove_language in cases where you will give languages back later.
+/atom/movable/proc/add_blocked_language(language, source = LANGUAGE_ATOM)
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.add_blocked_language(language, source)
+
+/// Removes a language from the blocked language list.
+/atom/movable/proc/remove_blocked_language(language, source = LANGUAGE_ATOM)
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.remove_blocked_language(language, source)
+
+/// Checks if atom has the language. If spoken is true, only checks if atom can speak the language.
+/atom/movable/proc/has_language(language, spoken = FALSE)
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.has_language(language, spoken)
+
+/// Checks if atom can speak the language.
+/atom/movable/proc/can_speak_language(language)
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.can_speak_language(language)
+
+/// Returns the result of tongue specific limitations on spoken languages.
+/atom/movable/proc/could_speak_language(language)
+	return TRUE
+
+/// Returns selected language, if it can be spoken, or finds, sets and returns a new selected language if possible.
+/atom/movable/proc/get_selected_language()
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.get_selected_language()
+
+/// Gets a random understood language, useful for hallucinations and such.
 /atom/movable/proc/get_random_understood_language()
-	var/datum/language_holder/H = get_language_holder()
-	. = H.get_random_understood_language()
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.get_random_understood_language()

-/atom/movable/proc/remove_language(datum/language/dt, body = FALSE)
-	var/datum/language_holder/H = get_language_holder(!body)
-	H.remove_language(dt, body)
+/// Gets a random spoken language, useful for forced speech and such.
+/atom/movable/proc/get_random_spoken_language()
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.get_random_spoken_language()

-/atom/movable/proc/remove_all_languages()
-	var/datum/language_holder/H = get_language_holder()
-	H.remove_all_languages()
+/// Copies all languages into the supplied atom/language holder. Source should be overridden when you
+/// do not want the language overwritten by later atom updates or want to avoid blocked languages.
+/atom/movable/proc/copy_languages(from_holder, source_override)
+	if(isatom(from_holder))
+		var/atom/movable/thing = from_holder
+		from_holder = thing.get_language_holder()
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.copy_languages(from_holder, source_override)

-/atom/movable/proc/has_language(datum/language/dt)
-	var/datum/language_holder/H = get_language_holder()
-	. = H.has_language(dt)
-
-/atom/movable/proc/copy_known_languages_from(thing, replace=FALSE)
-	var/datum/language_holder/H = get_language_holder()
-	. = H.copy_known_languages_from(thing, replace)
-
-// Whether an AM can speak in a language or not, independent of whether
-// it KNOWS the language
-/atom/movable/proc/could_speak_in_language(datum/language/dt)
-	. = TRUE
-
-/atom/movable/proc/can_speak_in_language(datum/language/dt)
-	var/datum/language_holder/H = get_language_holder()
-
-	if(!H.has_language(dt))
-		return FALSE
-	else if(H.omnitongue)
-		return TRUE
-	else if(could_speak_in_language(dt) && (!H.only_speaks_language || H.only_speaks_language == dt))
-		return TRUE
-	else
-		return FALSE
-
-/atom/movable/proc/get_default_language()
-	// if no language is specified, and we want to say() something, which
-	// language do we use?
-	var/datum/language_holder/H = get_language_holder()
-
-	if(H.selected_default_language)
-		if(can_speak_in_language(H.selected_default_language))
-			return H.selected_default_language
-		else
-			H.selected_default_language = null
-
-
-	var/datum/language/chosen_langtype
-	var/highest_priority
-
-	for(var/lt in H.languages)
-		var/datum/language/langtype = lt
-		if(!can_speak_in_language(langtype))
-			continue
-
-		var/pri = initial(langtype.default_priority)
-		if(!highest_priority || (pri > highest_priority))
-			chosen_langtype = langtype
-			highest_priority = pri
-
-	H.selected_default_language = .
-	. = chosen_langtype
+/// Empties out the atom specific languages and updates them according to the current atoms language holder.
+/// As a side effect, it also creates missing language holders in the process.
+/atom/movable/proc/update_atom_languages()
+	var/datum/language_holder/LH = get_language_holder()
+	return LH.update_atom_languages(src)

 /* End language procs */
+
+
 /atom/movable/proc/ConveyorMove(movedir)
 	set waitfor = FALSE
 	if(!anchored && has_gravity())
--- a/code/game/machinery/hologram.dm
+++ b/code/game/machinery/hologram.dm
@@ -396,7 +396,6 @@ GLOBAL_LIST_EMPTY(network_holopads)
 			Hologram.add_atom_colour("#77abff", FIXED_COLOUR_PRIORITY)
 			Hologram.Impersonation = user

-		Hologram.copy_known_languages_from(user,replace = TRUE)
 		Hologram.mouse_opacity = MOUSE_OPACITY_TRANSPARENT//So you can't click on it.
 		Hologram.layer = FLY_LAYER//Above all the other objects/mobs. Or the vast majority of them.
 		Hologram.setAnchored(TRUE)//So space wind cannot drag it.
@@ -555,9 +554,8 @@ For the other part of the code, check silicon say.dm. Particularly robot talk.*/
 	Hologram.alpha = 170
 	Hologram.add_atom_colour("#77abff", FIXED_COLOUR_PRIORITY)
 	Hologram.dir = SOUTH //for now
-	Hologram.grant_all_languages(omnitongue=TRUE)
 	var/datum/language_holder/holder = Hologram.get_language_holder()
-	holder.selected_default_language = record.language
+	holder.selected_language = record.language
 	Hologram.mouse_opacity = MOUSE_OPACITY_TRANSPARENT//So you can't click on it.
 	Hologram.layer = FLY_LAYER//Above all the other objects/mobs. Or the vast majority of them.
 	Hologram.setAnchored(TRUE)//So space wind cannot drag it.
@@ -649,7 +647,7 @@ For the other part of the code, check silicon say.dm. Particularly robot talk.*/
 			return
 		if(HOLORECORD_LANGUAGE)
 			var/datum/language_holder/holder = replay_holo.get_language_holder()
-			holder.selected_default_language = entry[2]
+			holder.selected_language = entry[2]
 		if(HOLORECORD_PRESET)
 			var/preset_type = entry[2]
 			var/datum/preset_holoimage/H = new preset_type
@@ -672,6 +670,7 @@ For the other part of the code, check silicon say.dm. Particularly robot talk.*/
 	updateDialog()

 /obj/effect/overlay/holo_pad_hologram
+	initial_language_holder = /datum/language_holder/universal
 	var/mob/living/Impersonation
 	var/datum/holocall/HC

--- a/code/game/machinery/telecomms/broadcasting.dm
+++ b/code/game/machinery/telecomms/broadcasting.dm
@@ -100,7 +100,7 @@
 	obj/source,  // the originating radio
 	frequency,  // the frequency the signal is taking place on
 	atom/movable/virtualspeaker/speaker,  // representation of the method's speaker
-	datum/language/language,  // the langauge of the message
+	datum/language/language,  // the language of the message
 	message,  // the text content of the message
 	spans  // the list of spans applied to the message
 )
--- a/code/game/objects/items/devices/radio/radio.dm
+++ b/code/game/objects/items/devices/radio/radio.dm
@@ -199,7 +199,7 @@
 	if(!spans)
 		spans = list(M.speech_span)
 	if(!language)
-		language = M.get_default_language()
+		language = M.get_selected_language()
 	INVOKE_ASYNC(src, .proc/talk_into_impl, M, message, channel, spans.Copy(), language)
 	return ITALICS | REDUCE_RANGE

--- a/code/game/objects/items/holy_weapons.dm
+++ b/code/game/objects/items/holy_weapons.dm
@@ -519,7 +519,9 @@
 		S.name = name
 		S.ckey = C.ckey
 		S.status_flags |= GODMODE
-		S.language_holder = user.language_holder.copy(S)
+		S.copy_languages(user, LANGUAGE_MASTER)	//Make sure the sword can understand and communicate with the user.
+		S.update_atom_languages()
+		grant_all_languages(FALSE, FALSE, TRUE)	//Grants omnitongue
 		S.AddElement(/datum/element/ghost_role_eligibility,penalize_on_ghost = TRUE)
 		START_PROCESSING(SSprocessing,src)
 		var/input = stripped_input(S,"What are you named?", ,"", MAX_NAME_LEN)
--- a/code/game/objects/structures/ghost_role_spawners.dm
+++ b/code/game/objects/structures/ghost_role_spawners.dm
@@ -32,6 +32,7 @@
 	new_spawn.undershirt = "Nude" //changing underwear/shirt/socks doesn't seem to function correctly right now because of some bug elsewhere?
 	new_spawn.socks = "Nude"
 	new_spawn.update_body(TRUE)
+	new_spawn.language_holder.selected_language = /datum/language/sylvan

 //Ash walker eggs: Spawns in ash walker dens in lavaland. Ghosts become unbreathing lizards that worship the Necropolis and are advised to retrieve corpses to create more ash walkers.

@@ -63,10 +64,6 @@
 	else
 		to_chat(new_spawn, "<span class='userdanger'>You have been born outside of your natural home! Whether you decide to return home, or make due with your new home is your own decision.</span>")

-	new_spawn.grant_language(/datum/language/draconic)
-	var/datum/language_holder/holder = new_spawn.get_language_holder()
-	holder.selected_default_language = /datum/language/draconic
-
 //Ash walkers on birth understand how to make bone bows, bone arrows and ashen arrows

 	new_spawn.mind.teach_crafting_recipe(/datum/crafting_recipe/bone_arrow)
--- a/code/game/say.dm
+++ b/code/game/say.dm
@@ -25,7 +25,7 @@ GLOBAL_LIST_INIT(freqtospan, list(
 		return
 	spans |= speech_span
 	if(!language)
-		language = get_default_language()
+		language = get_selected_language()
 	send_speech(message, 7, src, , spans, message_language=language)

 /atom/movable/proc/Hear(message, atom/movable/speaker, message_language, raw_message, radio_freq, list/spans, message_mode, atom/movable/source)
--- a/code/modules/antagonists/abductor/equipment/glands/slime.dm
+++ b/code/modules/antagonists/abductor/equipment/glands/slime.dm
@@ -10,7 +10,12 @@
 /obj/item/organ/heart/gland/slime/Insert(mob/living/carbon/M, special = 0, drop_if_replaced = TRUE)
 	..()
 	owner.faction |= "slime"
-	owner.grant_language(/datum/language/slime)
+	owner.grant_language(/datum/language/slime, TRUE, TRUE, LANGUAGE_GLAND)
+
+/obj/item/organ/heart/gland/slime/Remove(mob/living/carbon/M, special = 0)
+	..()
+	owner.faction -= "slime"
+	owner.remove_language(/datum/language/slime, TRUE, TRUE, LANGUAGE_GLAND)

 /obj/item/organ/heart/gland/slime/activate()
 	to_chat(owner, "<span class='warning'>You feel nauseated!</span>")
--- a/code/modules/antagonists/bloodsucker/datum_bloodsucker.dm
+++ b/code/modules/antagonists/bloodsucker/datum_bloodsucker.dm
@@ -20,7 +20,7 @@
 	var/poweron_feed = FALSE			// Am I feeding?
 	var/poweron_masquerade = FALSE
 	// STATS
-	var/bloodsucker_level 
+	var/bloodsucker_level
 	var/bloodsucker_level_unspent = 1
 	var/regen_rate = 0.3				// How fast do I regenerate?
 	var/additional_regen                // How much additional blood regen we gain from bonuses such as high blood.
@@ -209,7 +209,7 @@
 	// Physiology
 	CheckVampOrgans() // Heart, Eyes
 	// Language
-	owner.current.grant_language(/datum/language/vampiric)
+	owner.current.grant_language(/datum/language/vampiric, TRUE, TRUE, LANGUAGE_BLOODSUCKER)
 	owner.hasSoul = FALSE 		// If false, renders the character unable to sell their soul.
 	owner.isholy = FALSE 		// is this person a chaplain or admin role allowed to use bibles
 	// Disabilities
@@ -246,7 +246,7 @@
 	// Update Health
 	owner.current.setMaxHealth(100)
 	// Language
-	owner.current.remove_language(/datum/language/vampiric)
+	owner.current.remove_language(/datum/language/vampiric, TRUE, TRUE, LANGUAGE_BLOODSUCKER)
 	// Soul
 	if (owner.soulOwner == owner) // Return soul, if *I* own it.
 		owner.hasSoul = TRUE
@@ -649,10 +649,10 @@
 		return TRUE
 	// Check 3) If I am a BLOODSUCKER, then are they my Vassal?
 	if (mob_B && atom_V && (atom_V in mob_B.vassals))
-		return TRUE 
+		return TRUE
 	// Check 4) If we are both VASSAL, then do we have the same master?
 	if (atom_V && mob_V && atom_V.master == mob_V.master)
-		return TRUE 
+		return TRUE
 	return FALSE


@@ -710,7 +710,7 @@
 	invisibility = INVISIBILITY_ABSTRACT

 /obj/screen/bloodsucker/proc/update_counter(value, valuecolor)
-	invisibility = 0 
+	invisibility = 0

 /obj/screen/bloodsucker/blood_counter
 	icon = 'icons/mob/actions/bloodsucker.dmi'
@@ -758,7 +758,7 @@

 /obj/screen/bloodsucker/sunlight_counter/update_counter(value, valuecolor)
 	..()
-	maptext = "<div align='center' valign='bottom' style='position:relative; top:0px; left:6px'><font color='[valuecolor]'>[value]</font></div>"	
+	maptext = "<div align='center' valign='bottom' style='position:relative; top:0px; left:6px'><font color='[valuecolor]'>[value]</font></div>"

 /datum/antagonist/bloodsucker/proc/count_vassals(datum/mind/master)
 	var/datum/antagonist/bloodsucker/B = master.has_antag_datum(ANTAG_DATUM_BLOODSUCKER)
--- a/code/modules/antagonists/bloodsucker/datum_vassal.dm
+++ b/code/modules/antagonists/bloodsucker/datum_vassal.dm
@@ -48,7 +48,7 @@
 	objectives += vassal_objective
 	objectives_given += vassal_objective
 	give_thrall_eyes()
-	owner.current.grant_language(/datum/language/vampiric)
+	owner.current.grant_language(/datum/language/vampiric, TRUE, TRUE, LANGUAGE_VASSAL)
 	// Add Antag HUD
 	update_vassal_icons_added(owner.current, "vassal")
 	. = ..()
@@ -81,7 +81,7 @@
 		qdel(O)
 	objectives_given = list()
 	remove_thrall_eyes()
-	owner.current.remove_language(/datum/language/vampiric)
+	owner.current.remove_language(/datum/language/vampiric, TRUE, TRUE, LANGUAGE_VASSAL)
 	// Clear Antag HUD
 	update_vassal_icons_removed(owner.current)

--- a/code/modules/antagonists/changeling/changeling.dm
+++ b/code/modules/antagonists/changeling/changeling.dm
@@ -78,6 +78,7 @@
 	create_initial_profile()
 	if(give_objectives)
 		forge_objectives()
+	owner.current.grant_all_languages(FALSE, FALSE, TRUE)	//Grants omnitongue. We are able to transform our body after all.
 	remove_clownmut()
 	. = ..()

--- a/code/modules/antagonists/changeling/powers/absorb.dm
+++ b/code/modules/antagonists/changeling/powers/absorb.dm
@@ -61,10 +61,10 @@
 	if(user.nutrition < NUTRITION_LEVEL_WELL_FED)
 		user.nutrition = min((user.nutrition + target.nutrition), NUTRITION_LEVEL_WELL_FED)

-	if(target.mind)//if the victim has got a mind
-		// Absorb a lizard, speak Draconic.
-		user.copy_known_languages_from(target)
+	// Absorb a lizard, speak Draconic.
+	user.copy_languages(target, LANGUAGE_ABSORB)

+	if(target.mind && user.mind)//if the victim and user have minds
 		target.mind.show_memory(user, 0) //I can read your mind, kekeke. Output all their notes.

 		//Some of target's recent speech, so the changeling can attempt to imitate them better.
--- a/code/modules/antagonists/clockcult/clock_items/soul_vessel.dm
+++ b/code/modules/antagonists/clockcult/clock_items/soul_vessel.dm
@@ -31,6 +31,7 @@
 	laws = new /datum/ai_laws/ratvar()
 	braintype = picked_name
 	GLOB.all_clockwork_objects += src
+	brainmob.add_blocked_language(subtypesof(/datum/language) - /datum/language/ratvar, LANGUAGE_CLOCKIE)

 /obj/item/mmi/posibrain/soul_vessel/Destroy()
 	GLOB.all_clockwork_objects -= src
--- a/code/modules/antagonists/clockcult/clockcult.dm
+++ b/code/modules/antagonists/clockcult/clockcult.dm
@@ -91,7 +91,7 @@
 		current = mob_override
 	GLOB.all_clockwork_mobs += current
 	current.faction |= "ratvar"
-	current.grant_language(/datum/language/ratvar)
+	current.grant_language(/datum/language/ratvar, TRUE, TRUE, LANGUAGE_CLOCKIE)
 	current.update_action_buttons_icon() //because a few clockcult things are action buttons and we may be wearing/holding them for whatever reason, we need to update buttons
 	if(issilicon(current))
 		var/mob/living/silicon/S = current
@@ -102,6 +102,7 @@
 			R.module.rebuild_modules()
 		else if(isAI(S))
 			var/mob/living/silicon/ai/A = S
+			A.add_blocked_language(subtypesof(/datum/language) - /datum/language/ratvar, LANGUAGE_CLOCKIE)
 			A.can_be_carded = FALSE
 			A.requires_power = POWER_REQ_CLOCKCULT
 			var/list/AI_frame = list(mutable_appearance('icons/mob/clockwork_mobs.dmi', "aiframe")) //make the AI's cool frame
@@ -142,7 +143,7 @@
 		current = mob_override
 	GLOB.all_clockwork_mobs -= current
 	current.faction -= "ratvar"
-	current.remove_language(/datum/language/ratvar)
+	current.remove_language(/datum/language/ratvar, TRUE, TRUE, LANGUAGE_CLOCKIE)
 	current.clear_alert("clockinfo")
 	for(var/datum/action/innate/clockwork_armaments/C in owner.current.actions) //Removes any bound clockwork armor
 		qdel(C)
@@ -152,6 +153,7 @@
 		var/mob/living/silicon/S = current
 		if(isAI(S))
 			var/mob/living/silicon/ai/A = S
+			A.remove_blocked_language(subtypesof(/datum/language) - /datum/language/ratvar, LANGUAGE_CLOCKIE)
 			A.can_be_carded = initial(A.can_be_carded)
 			A.requires_power = initial(A.requires_power)
 			A.cut_overlays()
--- a/code/modules/antagonists/cult/cult.dm
+++ b/code/modules/antagonists/cult/cult.dm
@@ -116,7 +116,7 @@
 	if(mob_override)
 		current = mob_override
 	current.faction |= "cult"
-	current.grant_language(/datum/language/narsie)
+	current.grant_language(/datum/language/narsie, TRUE, TRUE, LANGUAGE_CULTIST)
 	if(!cult_team?.cult_master)
 		vote.Grant(current)
 	communion.Grant(current)
@@ -134,7 +134,7 @@
 	if(mob_override)
 		current = mob_override
 	current.faction -= "cult"
-	current.remove_language(/datum/language/narsie)
+	current.remove_language(/datum/language/narsie, TRUE, TRUE, LANGUAGE_CULTIST)
 	vote.Remove(current)
 	communion.Remove(current)
 	magic.Remove(current)
--- a/code/modules/antagonists/devil/devil.dm
+++ b/code/modules/antagonists/devil/devil.dm
@@ -527,7 +527,7 @@ GLOBAL_LIST_INIT(devil_suffix, list(" the Red", " the Soulless", " the Master",

 /datum/antagonist/devil/apply_innate_effects(mob/living/mob_override)
 	give_appropriate_spells()
-	owner.current.grant_all_languages(TRUE)
+	owner.current.grant_all_languages(TRUE, TRUE, TRUE, LANGUAGE_DEVIL)
 	update_hud()
 	.=..()

@@ -536,6 +536,7 @@ GLOBAL_LIST_INIT(devil_suffix, list(" the Red", " the Soulless", " the Master",
 		var/obj/effect/proc_holder/spell/S = X
 		if(is_type_in_typecache(S, devil_spells))
 			owner.RemoveSpell(S)
+	owner.current.remove_all_languages(LANGUAGE_DEVIL)
 	.=..()

 /datum/antagonist/devil/proc/printdevilinfo()
--- a/code/modules/antagonists/devil/true_devil/_true_devil.dm
+++ b/code/modules/antagonists/devil/true_devil/_true_devil.dm
@@ -29,7 +29,7 @@
 /mob/living/carbon/true_devil/Initialize()
 	create_bodyparts() //initialize bodyparts
 	create_internal_organs()
-	grant_all_languages(omnitongue=TRUE)
+	grant_all_languages()
 	..()

 /mob/living/carbon/true_devil/create_internal_organs()
--- a/code/modules/antagonists/traitor/classes/ai.dm
+++ b/code/modules/antagonists/traitor/classes/ai.dm
@@ -65,5 +65,5 @@
 /datum/traitor_class/ai/finalize_traitor(datum/antagonist/traitor/T)
 	T.add_law_zero()
 	T.owner.current.playsound_local(get_turf(T.owner.current), 'sound/ambience/antag/malf.ogg', 100, FALSE, pressure_affected = FALSE)
-	T.owner.current.grant_language(/datum/language/codespeak)
+	T.owner.current.grant_language(/datum/language/codespeak, TRUE, TRUE, LANGUAGE_MALF)
 	return FALSE
--- a/code/modules/antagonists/wizard/equipment/soulstone.dm
+++ b/code/modules/antagonists/wizard/equipment/soulstone.dm
@@ -233,7 +233,7 @@
 	newstruct.cancel_camera()


-/obj/item/soulstone/proc/init_shade(mob/living/carbon/human/T, mob/U, vic = 0)
+/obj/item/soulstone/proc/init_shade(mob/living/carbon/human/T, mob/user, vic = 0)
 	new /obj/effect/decal/remains/human(T.loc) //Spawns a skeleton
 	T.stop_sound_channel(CHANNEL_HEARTBEAT)
 	T.invisibility = INVISIBILITY_ABSTRACT
@@ -245,20 +245,23 @@
 	S.name = "Shade of [T.real_name]"
 	S.real_name = "Shade of [T.real_name]"
 	T.transfer_ckey(S)
-	S.language_holder = U.language_holder.copy(S)
-	if(U)
-		S.faction |= "[REF(U)]" //Add the master as a faction, allowing inter-mob cooperation
-	if(U && iscultist(U))
+	S.copy_languages(T, LANGUAGE_MIND)//Copies the old mobs languages into the new mob holder.
+	S.copy_languages(user, LANGUAGE_MASTER)
+	S.update_atom_languages()
+	grant_all_languages(FALSE, FALSE, TRUE)	//Grants omnitongue
+	if(user)
+		S.faction |= "[REF(user)]" //Add the master as a faction, allowing inter-mob cooperation
+	if(user && iscultist(user))
 		SSticker.mode.add_cultist(S.mind, 0)
 	S.cancel_camera()
 	name = "soulstone: Shade of [T.real_name]"
 	icon_state = "soulstone2"
-	if(U && (iswizard(U) || usability))
-		to_chat(S, "Your soul has been captured! You are now bound to [U.real_name]'s will. Help [U.p_them()] succeed in [U.p_their()] goals at all costs.")
-	else if(U && iscultist(U))
+	if(user && (iswizard(user) || usability))
+		to_chat(S, "Your soul has been captured! You are now bound to [user.real_name]'s will. Help [user.p_them()] succeed in [user.p_their()] goals at all costs.")
+	else if(user && iscultist(user))
 		to_chat(S, "Your soul has been captured! You are now bound to the cult's will. Help them succeed in their goals at all costs.")
-	if(vic && U)
-		to_chat(U, "<span class='info'><b>Capture successful!</b>:</span> [T.real_name]'s soul has been ripped from [T.p_their()] body and stored within the soul stone.")
+	if(vic && user)
+		to_chat(user, "<span class='info'><b>Capture successful!</b>:</span> [T.real_name]'s soul has been ripped from [T.p_their()] body and stored within the soul stone.")


 /obj/item/soulstone/proc/getCultGhost(mob/living/carbon/human/T, mob/U)
--- a/code/modules/events/sentience.dm
+++ b/code/modules/events/sentience.dm
@@ -9,7 +9,7 @@
 	role_name = "random animal"
 	var/animals = 1
 	var/one = "one"
-	/// Blacklisted mob_biotypes - Hey can we like, not have player controlled megafauna? 
+	/// Blacklisted mob_biotypes - Hey can we like, not have player controlled megafauna?
 	var/blacklisted_biotypes = MOB_EPIC
 	fakeable = TRUE

@@ -54,7 +54,7 @@

 		SG.transfer_ckey(SA, FALSE)

-		SA.grant_all_languages(TRUE)
+		SA.grant_all_languages(TRUE, FALSE, FALSE)

 		SA.sentience_act()

--- a/code/modules/integrated_electronics/subtypes/input.dm
+++ b/code/modules/integrated_electronics/subtypes/input.dm
@@ -865,7 +865,7 @@
 	var/translated = FALSE
 	if(speaker && message)
 		if(raw_message)
-			if(message_langs != get_default_language())
+			if(message_langs != get_selected_language())
 				translated = TRUE
 		set_pin_data(IC_OUTPUT, 1, speaker.GetVoice())
 		set_pin_data(IC_OUTPUT, 2, raw_message)
--- a/code/modules/jobs/job_types/curator.dm
+++ b/code/modules/jobs/job_types/curator.dm
@@ -41,4 +41,4 @@
 	if(visualsOnly)
 		return

-	H.grant_all_languages(omnitongue=TRUE)
+	H.grant_all_languages(TRUE, TRUE, TRUE, LANGUAGE_CURATOR)
--- a/code/modules/language/codespeak.dm
+++ b/code/modules/language/codespeak.dm
@@ -46,7 +46,7 @@
 		return

 	to_chat(user, "<span class='boldannounce'>You start skimming through [src], and suddenly your mind is filled with codewords and responses.</span>")
-	user.grant_language(/datum/language/codespeak)
+	user.grant_language(/datum/language/codespeak, TRUE, TRUE, LANGUAGE_MIND)

 	use_charge(user)

@@ -65,7 +65,7 @@
 		M.visible_message("<span class='danger'>[user] beats [M] over the head with [src]!</span>", "<span class='userdanger'>[user] beats you over the head with [src]!</span>", "<span class='italics'>You hear smacking.</span>")
 	else
 		M.visible_message("<span class='notice'>[user] teaches [M] by beating [M.p_them()] over the head with [src]!</span>", "<span class='boldnotice'>As [user] hits you with [src], codewords and responses flow through your mind.</span>", "<span class='italics'>You hear smacking.</span>")
-		M.grant_language(/datum/language/codespeak)
+		M.grant_language(/datum/language/codespeak, TRUE, TRUE, LANGUAGE_MIND)
 		use_charge(user)

 /obj/item/codespeak_manual/proc/use_charge(mob/user)
--- a/code/modules/language/language_holder.dm
+++ b/code/modules/language/language_holder.dm
@@ -1,149 +1,332 @@
-/datum/language_holder
-	var/list/languages = list(/datum/language/common)
-	var/list/shadow_languages = list()
-	var/only_speaks_language = null
-	var/selected_default_language = null
-	var/datum/language_menu/language_menu
+/*!Language holders will either exist in an atom/movable or a mind. Creation of language holders happens
+automatically when they are needed, for example when something tries to speak.
+Where a mind is available, the mind language holder will be the one "in charge". The mind holder
+will update its languages based on the atom holder, and will get updated as part of
+transformations and other events that cause new languages to become available.
+Every language holder has three lists of languages (and sources for each of them):
+- understood_languages
+- spoken_languages
+- blocked_languages
+Understood languages let you understand them, spoken languages lets you speak them
+(if your tongue is compatible), and blocked languages will let you do neither no matter
+what the source of the language is.
+Language holders are designed to mostly only ever require the use the helpers in atom/movable
+to achieve your goals, but it is also possible to work on them directly if needed. Any adding
+and removing of languages and sources should only happen through the procs, as directly changing
+these will mess something up somewhere down the line.
+All atom movables have the initial_language_holder var which allows you to set the default language
+holder to create. For example, /datum/language_holder/alien will give you xenocommon and a block for
+galactic common. Human species also have a default language holder var that will be updated on
+species change, initial_species_holder.
+Key procs
+* [grant_language](atom/movable.html#proc/grant_language)
+* [remove_language](atom/movable.html#proc/remove_language)
+* [add_blocked_language](atom/movable.html#proc/add_blocked_language)
+* [remove_blocked_language](atom/movable.html#proc/remove_blocked_language)
+* [grant_all_languages](atom/movable.html#proc/grant_all_languages)
+* [remove_all_languages](atom/movable.html#proc/remove_all_languages)
+* [has_language](atom/movable.html#proc/has_language)
+* [can_speak_language](atom/movable.html#proc/can_speak_language)
+* [get_selected_language](atom/movable.html#proc/get_selected_language)
+* [update_atom_languages](atom/movable.html#proc/update_atom_languages)
+*/

+/datum/language_holder
+	/// Understood languages.
+	var/list/understood_languages = list(/datum/language/common = list(LANGUAGE_MIND))
+	/// A list of languages that can be spoken. Tongue organ may also set limits beyond this list.
+	var/list/spoken_languages = list(/datum/language/common = list(LANGUAGE_ATOM))
+	/// A list of blocked languages. Used to prevent understanding and speaking certain languages, ie for certain mobs, mutations etc.
+	var/list/blocked_languages = list()
+	/// If true, overrides tongue limitations.
 	var/omnitongue = FALSE
+	/// Handles displaying the language menu UI.
+	var/datum/language_menu/language_menu
+	/// Currently spoken language
+	var/selected_language
+	/// Tracks the entity that owns the holder.
 	var/owner

-/datum/language_holder/New(owner)
-	src.owner = owner
-
-	languages = typecacheof(languages)
-	shadow_languages = typecacheof(shadow_languages)
-
-/datum/language_holder/Destroy()
-	owner = null
-	QDEL_NULL(language_menu)
-	languages.Cut()
-	shadow_languages.Cut()
-	return ..()
-
-/datum/language_holder/proc/copy(newowner)
-	var/datum/language_holder/copy = new(newowner)
-	copy.languages = src.languages.Copy()
-	// shadow languages are not copied.
-	copy.only_speaks_language = src.only_speaks_language
-	copy.selected_default_language = src.selected_default_language
-	// language menu is not copied, that's tied to the holder.
-	copy.omnitongue = src.omnitongue
-	return copy
-
-/datum/language_holder/proc/grant_language(datum/language/dt, shadow = FALSE)
-	if(shadow)
-		shadow_languages[dt] = TRUE
-	else
-		languages[dt] = TRUE
-
-/datum/language_holder/proc/grant_all_languages(omnitongue=FALSE)
-	for(var/la in GLOB.all_languages)
-		grant_language(la)
-
-	if(omnitongue)
-		src.omnitongue = TRUE
-
-/datum/language_holder/proc/get_random_understood_language()
-	var/list/possible = list()
-	for(var/dt in languages)
-		possible += dt
-	. = safepick(possible)
-
-/datum/language_holder/proc/remove_language(datum/language/dt, shadow = FALSE)
-	if(shadow)
-		shadow_languages -= dt
-	else
-		languages -= dt
-
-/datum/language_holder/proc/remove_all_languages()
-	languages.Cut()
-
-/datum/language_holder/proc/has_language(datum/language/dt)
-	if(is_type_in_typecache(dt, languages))
-		return LANGUAGE_KNOWN
-	else
-		var/atom/movable/AM = get_atom()
-		var/datum/language_holder/L = AM.get_language_holder(shadow=FALSE)
-		if(L != src)
-			if(is_type_in_typecache(dt, L.shadow_languages))
-				return LANGUAGE_SHADOWED
-	return FALSE
-
-/datum/language_holder/proc/copy_known_languages_from(thing, replace=FALSE)
-	var/datum/language_holder/other
-	if(istype(thing, /datum/language_holder))
-		other = thing
-	else if(ismovable(thing))
-		var/atom/movable/AM = thing
-		other = AM.get_language_holder()
-	else if(istype(thing, /datum/mind))
-		var/datum/mind/M = thing
-		other = M.get_language_holder()
-
-	if(replace)
-		src.remove_all_languages()
-
-	for(var/l in other.languages)
-		src.grant_language(l)
-
-
-/datum/language_holder/proc/open_language_menu(mob/user)
-	if(!language_menu)
-		language_menu = new(src)
-	language_menu.ui_interact(user)
-
-/datum/language_holder/proc/get_atom()
-	if(ismovable(owner))
-		. = owner
-	else if(istype(owner, /datum/mind))
+/// Initializes, and copies in the languages from the current atom if available.
+/datum/language_holder/New(_owner)
+	owner = _owner
+	if(istype(owner, /datum/mind))
 		var/datum/mind/M = owner
 		if(M.current)
-			. = M.current
+			update_atom_languages(M.current)
+	get_selected_language()
+
+/datum/language_holder/Destroy()
+	QDEL_NULL(language_menu)
+	return ..()
+
+/// Grants the supplied language.
+/datum/language_holder/proc/grant_language(language, understood = TRUE, spoken = TRUE, source = LANGUAGE_MIND)
+	if(understood)
+		if(!understood_languages[language])
+			understood_languages[language] = list()
+		understood_languages[language] |= source
+		. = TRUE
+	if(spoken)
+		if(!spoken_languages[language])
+			spoken_languages[language] = list()
+		spoken_languages[language] |= source
+		. = TRUE
+
+/// Grants every language to understood and spoken, and gives omnitongue.
+/datum/language_holder/proc/grant_all_languages(understood = TRUE, spoken = TRUE, grant_omnitongue = TRUE, source = LANGUAGE_MIND)
+	for(var/language in GLOB.all_languages)
+		grant_language(language, understood, spoken, source)
+	if(grant_omnitongue)	// Overrides tongue limitations.
+		omnitongue = TRUE
+	return TRUE
+
+/// Removes a single language or source, removing all sources returns the pre-removal state of the language.
+/datum/language_holder/proc/remove_language(language, understood = TRUE, spoken = TRUE, source = LANGUAGE_ALL)
+	if(understood && understood_languages[language])
+		if(source == LANGUAGE_ALL)
+			understood_languages -= language
+		else
+			understood_languages[language] -= source
+			if(!length(understood_languages[language]))
+				understood_languages -= language
+		. = TRUE
+
+	if(spoken && spoken_languages[language])
+		if(source == LANGUAGE_ALL)
+			spoken_languages -= language
+		else
+			spoken_languages[language] -= source
+			if(!length(spoken_languages[language]))
+				spoken_languages -= language
+		. = TRUE
+
+/// Removes every language and optionally sets omnitongue false. If a non default source is supplied, only removes that source.
+/datum/language_holder/proc/remove_all_languages(source = LANGUAGE_ALL, remove_omnitongue = FALSE)
+	for(var/language in GLOB.all_languages)
+		remove_language(language, TRUE, TRUE, source)
+	if(remove_omnitongue)
+		omnitongue = FALSE
+	return TRUE
+
+/// Adds a single language or list of languages to the blocked language list.
+/datum/language_holder/proc/add_blocked_language(languages, source = LANGUAGE_MIND)
+	if(!islist(languages))
+		languages = list(languages)
+	for(var/language in languages)
+		if(!blocked_languages[language])
+			blocked_languages[language] = list()
+		blocked_languages[language] |= source
+	return TRUE
+
+/// Removes a single language or list of languages from the blocked language list.
+/datum/language_holder/proc/remove_blocked_language(languages, source = LANGUAGE_MIND)
+	if(!islist(languages))
+		languages = list(languages)
+	for(var/language in languages)
+		if(blocked_languages[language])
+			if(source == LANGUAGE_ALL)
+				blocked_languages -= language
+			else
+				blocked_languages[language] -= source
+				if(!length(blocked_languages[language]))
+					blocked_languages -= language
+	return TRUE
+
+/// Checks if you have the language. If spoken is true, only checks if you can speak the language.
+/datum/language_holder/proc/has_language(language, spoken = FALSE)
+	if(language in blocked_languages)
+		return FALSE
+	if(spoken)
+		return language in spoken_languages
+	return language in understood_languages
+
+/// Checks if you can speak the language. Tongue limitations should be supplied as an argument.
+/datum/language_holder/proc/can_speak_language(language)
+	var/atom/movable/ouratom = get_atom()
+	var/tongue = ouratom.could_speak_language(language)
+	if((omnitongue || tongue) && has_language(language, TRUE))
+		return TRUE
+	return FALSE
+
+/// Returns selected language if it can be spoken, or decides, sets and returns a new selected language if possible.
+/datum/language_holder/proc/get_selected_language()
+	if(selected_language && can_speak_language(selected_language))
+		return selected_language
+	selected_language = null
+	var/highest_priority
+	for(var/lang in spoken_languages)
+		var/datum/language/language = lang
+		var/priority = initial(language.default_priority)
+		if((!highest_priority || (priority > highest_priority)) && !(language in blocked_languages))
+			if(can_speak_language(language))
+				selected_language = language
+				highest_priority = priority
+	return selected_language
+
+/// Gets a random understood language, useful for hallucinations and such.
+/datum/language_holder/proc/get_random_understood_language()
+	return pick(understood_languages)
+
+/// Gets a random spoken language, useful for forced speech and such.
+/datum/language_holder/proc/get_random_spoken_language()
+	return pick(spoken_languages)
+
+/// Opens a language menu reading from the language holder.
+/datum/language_holder/proc/open_language_menu(mob/user)
+	if(!language_menu)
+		language_menu = new (src)
+	language_menu.ui_interact(user)
+
+/// Gets the atom, since we some times need to check if the tongue has limitations.
+/datum/language_holder/proc/get_atom()
+	if(owner)
+		if(istype(owner, /datum/mind))
+			var/datum/mind/M = owner
+			return M.current
+		return owner
+	return FALSE
+
+/// Empties out the atom specific languages and updates them according to the supplied atoms language holder.
+/datum/language_holder/proc/update_atom_languages(atom/movable/thing)
+	var/datum/language_holder/from_atom = thing.get_language_holder(FALSE)	//Gets the atoms language holder
+	if(from_atom == src)	//This could happen if called on an atom without a mind.
+		return FALSE
+	for(var/language in understood_languages)
+		remove_language(language, TRUE, FALSE, LANGUAGE_ATOM)
+	for(var/language in spoken_languages)
+		remove_language(language, FALSE, TRUE, LANGUAGE_ATOM)
+	for(var/language in blocked_languages)
+		remove_blocked_language(language, LANGUAGE_ATOM)
+
+	copy_languages(from_atom)
+	get_selected_language()
+	return TRUE
+
+/// Copies all languages from the supplied atom/language holder. Source should be overridden when you
+/// do not want the language overwritten by later atom updates or want to avoid blocked languages.
+/datum/language_holder/proc/copy_languages(var/datum/language_holder/from_holder, source_override)
+	if(source_override)	//No blocked languages here, for now only used by ling absorb.
+		for(var/language in from_holder.understood_languages)
+			grant_language(language, TRUE, FALSE, source_override)
+		for(var/language in from_holder.spoken_languages)
+			grant_language(language, FALSE, TRUE, source_override)
+	else
+		for(var/language in from_holder.understood_languages)
+			grant_language(language, TRUE, FALSE, from_holder.understood_languages[language])
+		for(var/language in from_holder.spoken_languages)
+			grant_language(language, FALSE, TRUE, from_holder.spoken_languages[language])
+		for(var/language in from_holder.blocked_languages)
+			add_blocked_language(language, from_holder.blocked_languages[language])
+	return TRUE
+
+
+//************************************************
+//*        Specific language holders              *
+//*      Use atom language sources only.           *
+//************************************************/
+

 /datum/language_holder/alien
-	languages = list(/datum/language/xenocommon)
-
-/datum/language_holder/monkey
-	languages = list(/datum/language/monkey)
-
-/datum/language_holder/swarmer
-	languages = list(/datum/language/swarmer)
+	understood_languages = list(/datum/language/xenocommon = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/xenocommon = list(LANGUAGE_ATOM))
+	blocked_languages = list(/datum/language/common = list(LANGUAGE_ATOM))

 /datum/language_holder/clockmob
-	languages = list(/datum/language/common, /datum/language/ratvar)
-	only_speaks_language = /datum/language/ratvar
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/ratvar = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/ratvar = list(LANGUAGE_ATOM))

 /datum/language_holder/construct
-	languages = list(/datum/language/common, /datum/language/narsie)
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/narsie = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+							/datum/language/narsie = list(LANGUAGE_ATOM))

 /datum/language_holder/drone
-	languages = list(/datum/language/common, /datum/language/drone, /datum/language/machine)
-	only_speaks_language = /datum/language/drone
+	understood_languages = list(/datum/language/drone = list(LANGUAGE_ATOM),
+								/datum/language/machine = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/drone = list(LANGUAGE_ATOM))
+	blocked_languages = list(/datum/language/common = list(LANGUAGE_ATOM))

 /datum/language_holder/drone/syndicate
-	only_speaks_language = null
+	blocked_languages = null

 /datum/language_holder/dwarf
-	languages = list(/datum/language/common, /datum/language/dwarf)
-	only_speaks_language = /datum/language/dwarf
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/dwarf = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+							/datum/language/dwarf = list(LANGUAGE_ATOM))

-/datum/language_holder/slime
-	languages = list(/datum/language/common, /datum/language/slime)
-	only_speaks_language = /datum/language/slime
+/datum/language_holder/jelly
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/slime = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+							/datum/language/slime = list(LANGUAGE_ATOM))

 /datum/language_holder/lightbringer
-	// TODO change to a lightbringer specific sign language
-	languages = list(/datum/language/slime)
+	understood_languages = list(/datum/language/slime = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/slime = list(LANGUAGE_ATOM))
+	blocked_languages = list(/datum/language/common = list(LANGUAGE_ATOM))
+
+/datum/language_holder/lizard
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/draconic = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+							/datum/language/draconic = list(LANGUAGE_ATOM))
+
+/datum/language_holder/lizard/ash
+	selected_language = /datum/language/draconic
+
+/datum/language_holder/monkey
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/monkey = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/monkey = list(LANGUAGE_ATOM))
+
+/datum/language_holder/mushroom
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/mushroom = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+							/datum/language/mushroom = list(LANGUAGE_ATOM))
+
+/datum/language_holder/slime
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/slime = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/slime = list(LANGUAGE_ATOM))
+
+/datum/language_holder/swarmer
+	understood_languages = list(/datum/language/swarmer = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/swarmer = list(LANGUAGE_ATOM))
+	blocked_languages = list(/datum/language/common = list(LANGUAGE_ATOM))
+
+/datum/language_holder/sylvan
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/sylvan = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+							/datum/language/sylvan = list(LANGUAGE_ATOM))
+

 /datum/language_holder/synthetic
-	languages = list(/datum/language/common)
-	shadow_languages = list(/datum/language/common, /datum/language/machine, /datum/language/draconic, /datum/language/slime, /datum/language/dwarf)
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/machine = list(LANGUAGE_ATOM),
+								/datum/language/draconic = list(LANGUAGE_ATOM),
+								/datum/language/slime = list(LANGUAGE_ATOM),
+								/datum/language/dwarf = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+							/datum/language/machine = list(LANGUAGE_ATOM),
+							/datum/language/draconic = list(LANGUAGE_ATOM),
+							/datum/language/slime = list(LANGUAGE_ATOM),
+							/datum/language/dwarf = list(LANGUAGE_ATOM))
+
+/datum/language_holder/venus
+	understood_languages = list(/datum/language/common = list(LANGUAGE_ATOM),
+								/datum/language/sylvan = list(LANGUAGE_ATOM))
+	spoken_languages = list(/datum/language/sylvan = list(LANGUAGE_ATOM))

 /datum/language_holder/empty
-	languages = list()
-	shadow_languages = list()
+	understood_languages = list()
+	spoken_languages = list()

 /datum/language_holder/universal/New()
 	..()
-	grant_all_languages(omnitongue=TRUE)
+	grant_all_languages()
--- a/code/modules/language/language_menu.dm
+++ b/code/modules/language/language_menu.dm
@@ -1,8 +1,8 @@
 /datum/language_menu
 	var/datum/language_holder/language_holder

-/datum/language_menu/New(language_holder)
-	src.language_holder = language_holder
+/datum/language_menu/New(_language_holder)
+	language_holder = _language_holder

 /datum/language_menu/Destroy()
 	language_holder = null
@@ -24,21 +24,20 @@
 		data["is_living"] = FALSE

 	data["languages"] = list()
-	for(var/ld in GLOB.all_languages)
-		var/result = language_holder.has_language(ld)
+	for(var/lang in GLOB.all_languages)
+		var/result = language_holder.has_language(lang) || language_holder.has_language(lang, TRUE)
 		if(!result)
 			continue
-		var/shadow = result == LANGUAGE_SHADOWED
-		var/datum/language/LD = ld
+		var/datum/language/language = lang
 		var/list/L = list()

-		L["name"] = initial(LD.name)
-		L["desc"] = initial(LD.desc)
-		L["key"] = initial(LD.key)
-		L["is_default"] = (LD == language_holder.selected_default_language)
-		L["shadow"] = shadow
+		L["name"] = initial(language.name)
+		L["desc"] = initial(language.desc)
+		L["key"] = initial(language.key)
+		L["is_default"] = (language == language_holder.selected_language)
 		if(AM)
-			L["can_speak"] = AM.can_speak_in_language(LD)
+			L["can_speak"] = AM.can_speak_language(language)
+			L["can_understand"] = AM.has_language(language)

 		data["languages"] += list(L)

@@ -47,15 +46,15 @@
 		data["omnitongue"] = language_holder.omnitongue

 		data["unknown_languages"] = list()
-		for(var/ld in GLOB.all_languages)
-			if(language_holder.has_language(ld))
+		for(var/lang in GLOB.all_languages)
+			if(language_holder.has_language(lang) || language_holder.has_language(lang, TRUE))
 				continue
-			var/datum/language/LD = ld
+			var/datum/language/language = lang
 			var/list/L = list()

-			L["name"] = initial(LD.name)
-			L["desc"] = initial(LD.desc)
-			L["key"] = initial(LD.key)
+			L["name"] = initial(language.name)
+			L["desc"] = initial(language.desc)
+			L["key"] = initial(language.key)

 			data["unknown_languages"] += list(L)
 	return data
@@ -68,27 +67,51 @@

 	var/language_name = params["language_name"]
 	var/datum/language/language_datum
-	for(var/ld in GLOB.all_languages)
-		var/datum/language/LD = ld
-		if(language_name == initial(LD.name))
-			language_datum = LD
+	for(var/lang in GLOB.all_languages)
+		var/datum/language/language = lang
+		if(language_name == initial(language.name))
+			language_datum = language
 	var/is_admin = check_rights_for(user.client, R_ADMIN)

 	switch(action)
 		if("select_default")
-			if(language_datum && AM.can_speak_in_language(language_datum))
-				language_holder.selected_default_language = language_datum
+			if(language_datum && AM.can_speak_language(language_datum))
+				language_holder.selected_language = language_datum
 				. = TRUE
 		if("grant_language")
 			if((is_admin || isobserver(AM)) && language_datum)
-				language_holder.grant_language(language_datum)
+				var/list/choices = list("Only Spoken", "Only Understood", "Both")
+				var/choice = input(user,"How do you want to add this language?","[language_datum]",null) as null|anything in choices
+				var/spoken = FALSE
+				var/understood = FALSE
+				switch(choice)
+					if("Only Spoken")
+						spoken = TRUE
+					if("Only Understood")
+						understood = TRUE
+					if("Both")
+						spoken = TRUE
+						understood = TRUE
+				language_holder.grant_language(language_datum, understood, spoken)
 				if(is_admin)
 					message_admins("[key_name_admin(user)] granted the [language_name] language to [key_name_admin(AM)].")
 					log_admin("[key_name(user)] granted the language [language_name] to [key_name(AM)].")
 				. = TRUE
 		if("remove_language")
 			if((is_admin || isobserver(AM)) && language_datum)
-				language_holder.remove_language(language_datum)
+				var/list/choices = list("Only Spoken", "Only Understood", "Both")
+				var/choice = input(user,"Which part do you wish to remove?","[language_datum]",null) as null|anything in choices
+				var/spoken = FALSE
+				var/understood = FALSE
+				switch(choice)
+					if("Only Spoken")
+						spoken = TRUE
+					if("Only Understood")
+						understood = TRUE
+					if("Both")
+						spoken = TRUE
+						understood = TRUE
+				language_holder.remove_language(language_datum, understood, spoken)
 				if(is_admin)
 					message_admins("[key_name_admin(user)] removed the [language_name] language to [key_name_admin(AM)].")
 					log_admin("[key_name(user)] removed the language [language_name] to [key_name(AM)].")
--- a/code/modules/language/sylvan.dm
+++ b/code/modules/language/sylvan.dm
@@ -0,0 +1,19 @@
+// The language of the vinebings. Yes, it's a shameless ripoff of elvish.
+/datum/language/sylvan
+	name = "Sylvan"
+	desc = "A complicated, ancient language spoken by vine like beings."
+	speech_verb = "expresses"
+	ask_verb = "inquires"
+	exclaim_verb = "declares"
+	key = "h"
+	space_chance = 20
+	syllables = list(
+		"fii", "sii", "rii", "rel", "maa", "ala", "san", "tol", "tok", "dia", "eres",
+    	"fal", "tis", "bis", "qel", "aras", "losk", "rasa", "eob", "hil", "tanl", "aere",
+    	"fer", "bal", "pii", "dala", "ban", "foe", "doa", "cii", "uis", "mel", "wex",
+    	"incas", "int", "elc", "ent", "aws", "qip", "nas", "vil", "jens", "dila", "fa",
+    	"la", "re", "do", "ji", "ae", "so", "qe", "ce", "na", "mo", "ha", "yu"
+	)
+	icon = 'icons/obj/hydroponics/harvest.dmi'
+	icon_state = "lily"
+	default_priority = 90
--- a/code/modules/mining/lavaland/necropolis_chests.dm
+++ b/code/modules/mining/lavaland/necropolis_chests.dm
@@ -564,7 +564,7 @@

 /obj/item/book_of_babel/attack_self(mob/user)
 	to_chat(user, "You flip through the pages of the book, quickly and conveniently learning every language in existence. Somewhat less conveniently, the aging book crumbles to dust in the process. Whoops.")
-	user.grant_all_languages(omnitongue=TRUE)
+	user.grant_all_languages()
 	new /obj/effect/decal/cleanable/ash(get_turf(user))
 	qdel(src)

--- a/code/modules/mob/living/brain/say.dm
+++ b/code/modules/mob/living/brain/say.dm
@@ -25,10 +25,3 @@
 /mob/living/brain/treat_message(message)
 	message = capitalize(message)
 	return message
-
-/mob/living/brain/could_speak_in_language(datum/language/dt)
-	if(istype(container, /obj/item/mmi/posibrain/soul_vessel))
-		// soul vessels can only speak ratvarian.
-		. = ispath(dt, /datum/language/ratvar)
-	else
-		. = ..()
--- a/code/modules/mob/living/carbon/human/species.dm
+++ b/code/modules/mob/living/carbon/human/species.dm
@@ -49,6 +49,7 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 	var/blacklisted = 0 //Flag to exclude from green slime core species.
 	var/dangerous_existence //A flag for transformation spells that tells them "hey if you turn a person into one of these without preperation, they'll probably die!"
 	var/say_mod = "says"	// affects the speech message
+	var/species_language_holder = /datum/language_holder
 	var/list/mutant_bodyparts = list() 	// Visible CURRENT bodyparts that are unique to a species. Changes to this list for non-species specific bodyparts (ie cat ears and tails) should be assigned at organ level if possible. Layer hiding is handled by handle_mutant_bodyparts() below.
 	var/list/mutant_organs = list()		//Internal organs that are unique to this race.
 	var/speedmod = 0	// this affects the race's speed. positive numbers make it move slower, negative numbers make it move faster
--- a/code/modules/mob/living/carbon/human/species_types/android.dm
+++ b/code/modules/mob/living/carbon/human/species_types/android.dm
@@ -9,6 +9,7 @@
 	gib_types = /obj/effect/gibspawner/robot
 	damage_overlay_type = "synth"
 	mutanttongue = /obj/item/organ/tongue/robot
+	species_language_holder = /datum/language_holder/synthetic
 	limbs_id = "synth"

 /datum/species/android/on_species_gain(mob/living/carbon/C)
--- a/code/modules/mob/living/carbon/human/species_types/dwarves.dm
+++ b/code/modules/mob/living/carbon/human/species_types/dwarves.dm
@@ -17,6 +17,7 @@ GLOBAL_LIST_INIT(dwarf_last, world.file2list("strings/names/dwarf_last.txt")) //
 	disliked_food = JUNKFOOD | FRIED //Dwarves hate foods that have no nutrition other than alcohol.
 	mutant_organs = list(/obj/item/organ/dwarfgland) //Dwarven alcohol gland, literal gland warrior
 	mutantliver = /obj/item/organ/liver/dwarf //Dwarven super liver (Otherwise they r doomed)
+	species_language_holder = /datum/language_holder/dwarf

 /mob/living/carbon/human/species/dwarf //species admin spawn path
 	race = /datum/species/dwarf //and the race the path is set to.
@@ -30,7 +31,6 @@ GLOBAL_LIST_INIT(dwarf_last, world.file2list("strings/names/dwarf_last.txt")) //
 	. = ..()
 	var/dwarf_hair = pick("Beard (Dwarf)", "Beard (Very Long)", "Beard (Long)") //beard roullette
 	var/mob/living/carbon/human/H = C
-	H.grant_language(/datum/language/dwarf)
 	H.facial_hair_style = dwarf_hair
 	H.update_hair()
 	H.transform = H.transform.Scale(1, 0.8) //We use scale, and yeah. Dwarves can become gnomes with DWARFISM.
@@ -40,7 +40,6 @@ GLOBAL_LIST_INIT(dwarf_last, world.file2list("strings/names/dwarf_last.txt")) //
 	. = ..()
 	H.transform = H.transform.Scale(1, 1.25) //And we undo it.
 	UnregisterSignal(H, COMSIG_MOB_SAY) //We register handle_speech is not being used.
-	H.remove_language(/datum/language/dwarf)

 //Dwarf Name stuff
 /proc/dwarf_name() //hello caller: my name is urist mcuristurister
--- a/code/modules/mob/living/carbon/human/species_types/jellypeople.dm
+++ b/code/modules/mob/living/carbon/human/species_types/jellypeople.dm
@@ -21,20 +21,19 @@
 	coldmod = 6   // = 3x cold damage
 	heatmod = 0.5 // = 1/4x heat damage
 	burnmod = 0.5 // = 1/2x generic burn damage
+	species_language_holder = /datum/language_holder/jelly

 /datum/species/jelly/on_species_loss(mob/living/carbon/C)
 	if(regenerate_limbs)
 		regenerate_limbs.Remove(C)
 	if(slime_change)	//CIT CHANGE
 		slime_change.Remove(C)	//CIT CHANGE
-	C.remove_language(/datum/language/slime)
 	C.faction -= "slime"
 	..()
 	C.faction -= "slime"

 /datum/species/jelly/on_species_gain(mob/living/carbon/C, datum/species/old_species)
 	..()
-	C.grant_language(/datum/language/slime)
 	if(ishuman(C))
 		regenerate_limbs = new
 		regenerate_limbs.Grant(C)
--- a/code/modules/mob/living/carbon/human/species_types/lizardpeople.dm
+++ b/code/modules/mob/living/carbon/human/species_types/lizardpeople.dm
@@ -24,9 +24,7 @@
 	disliked_food = GRAIN | DAIRY
 	liked_food = GROSS | MEAT
 	inert_mutation = FIREBREATH
-
-/datum/species/lizard/after_equip_job(datum/job/J, mob/living/carbon/human/H)
-	H.grant_language(/datum/language/draconic)
+	species_language_holder = /datum/language_holder/lizard

 /datum/species/lizard/random_name(gender,unique,lastname)
 	if(unique)
@@ -86,6 +84,7 @@
 	mutantlungs = /obj/item/organ/lungs/ashwalker
 	burnmod = 0.9
 	brutemod = 0.9
+	species_language_holder = /datum/language_holder/lizard/ash

 /datum/species/lizard/ashwalker/on_species_gain(mob/living/carbon/human/C, datum/species/old_species)
 	if((C.dna.features["spines"] != "None" ) && (C.dna.features["tail_lizard"] == "None")) //tbh, it's kinda ugly for them not to have a tail yet have floating spines
--- a/code/modules/mob/living/carbon/human/species_types/mushpeople.dm
+++ b/code/modules/mob/living/carbon/human/species_types/mushpeople.dm
@@ -23,9 +23,7 @@

 	mutanteyes = /obj/item/organ/eyes/night_vision/mushroom
 	var/datum/martial_art/mushpunch/mush
-
-/datum/species/mush/after_equip_job(datum/job/J, mob/living/carbon/human/H)
-	H.grant_language(/datum/language/mushroom) //pomf pomf
+	species_language_holder = /datum/language_holder/mushroom

 /datum/species/mush/on_species_gain(mob/living/carbon/C, datum/species/old_species)
 	. = ..()
--- a/code/modules/mob/living/carbon/human/species_types/podpeople.dm
+++ b/code/modules/mob/living/carbon/human/species_types/podpeople.dm
@@ -12,6 +12,7 @@
 	meat = /obj/item/reagent_containers/food/snacks/meat/slab/human/mutant/plant
 	disliked_food = MEAT | DAIRY
 	liked_food = VEGETABLES | FRUIT | GRAIN
+	species_language_holder = /datum/language_holder/sylvan
 	var/light_nutrition_gain_factor = 10
 	var/light_toxheal = 1
 	var/light_oxyheal = 1
--- a/code/modules/mob/living/carbon/human/species_types/synths.dm
+++ b/code/modules/mob/living/carbon/human/species_types/synths.dm
@@ -16,6 +16,7 @@
 	var/list/initial_inherent_traits = list(TRAIT_VIRUSIMMUNE,TRAIT_NODISMEMBER,TRAIT_NOLIMBDISABLE,TRAIT_NOHUNGER,TRAIT_NOBREATH)
 	var/disguise_fail_health = 75 //When their health gets to this level their synthflesh partially falls off
 	var/datum/species/fake_species = null //a species to do most of our work for us, unless we're damaged
+	species_language_holder = /datum/language_holder/synthetic

 /datum/species/synth/military
 	name = "Military Synth"
--- a/code/modules/mob/living/carbon/human/status_procs.dm
+++ b/code/modules/mob/living/carbon/human/status_procs.dm
@@ -34,12 +34,11 @@
 /mob/living/carbon/human/set_drugginess(amount)
 	..()
 	if(!amount)
-		remove_language(/datum/language/beachbum)
+		remove_language(/datum/language/beachbum, TRUE, TRUE, LANGUAGE_HIGH)

 /mob/living/carbon/human/adjust_drugginess(amount)
 	..()
-	if(!dna.check_mutation(STONER))
-		if(druggy)
-			grant_language(/datum/language/beachbum)
-		else
-			remove_language(/datum/language/beachbum)
+	if(druggy)
+		grant_language(/datum/language/beachbum, TRUE, TRUE, LANGUAGE_HIGH)
+	else
+		remove_language(/datum/language/beachbum, TRUE, TRUE, LANGUAGE_HIGH)
--- a/code/modules/mob/living/carbon/say.dm
+++ b/code/modules/mob/living/carbon/say.dm
@@ -12,9 +12,9 @@
 		return 0
 	return ..()

-/mob/living/carbon/could_speak_in_language(datum/language/dt)
+/mob/living/carbon/could_speak_language(datum/language/language)
 	var/obj/item/organ/tongue/T = getorganslot(ORGAN_SLOT_TONGUE)
 	if(T)
-		. = T.could_speak_in_language(dt)
+		return T.could_speak_language(language)
 	else
-		. = initial(dt.flags) & TONGUELESS_SPEECH
+		return initial(language.flags) & TONGUELESS_SPEECH
--- a/code/modules/mob/living/living_defines.dm
+++ b/code/modules/mob/living/living_defines.dm
@@ -98,8 +98,6 @@

 	var/datum/riding/riding_datum

-	var/datum/language/selected_default_language
-
 	var/last_words	//used for database logging

 	var/list/obj/effect/proc_holder/abilities = list()
--- a/code/modules/mob/living/say.dm
+++ b/code/modules/mob/living/say.dm
@@ -133,7 +133,7 @@ GLOBAL_LIST_INIT(department_radio_keys, list(
 	var/datum/language/message_language = get_message_language(message)
 	if(message_language)
 		// No, you cannot speak in xenocommon just because you know the key
-		if(can_speak_in_language(message_language))
+		if(can_speak_language(message_language))
 			language = message_language
 		message = copytext_char(message, 3)

@@ -141,7 +141,7 @@ GLOBAL_LIST_INIT(department_radio_keys, list(
 		message = trim_left(message)

 	if(!language)
-		language = get_default_language()
+		language = get_selected_language()

 	// Detection of language needs to be before inherent channels, because
 	// AIs use inherent channels for the holopad. Most inherent channels
@@ -415,11 +415,7 @@ GLOBAL_LIST_INIT(department_radio_keys, list(
 /mob/living/whisper(message, bubble_type, list/spans = list(), sanitize = TRUE, datum/language/language = null, ignore_spam = FALSE, forced = null)
 	say("#[message]", bubble_type, spans, sanitize, language, ignore_spam, forced)

-/mob/living/get_language_holder(shadow=TRUE)
-	if(mind && shadow)
-		// Mind language holders shadow mob holders.
-		. = mind.get_language_holder()
-		if(.)
-			return .
-
+/mob/living/get_language_holder(get_minds = TRUE)
+	if(get_minds && mind)
+		return mind.get_language_holder()
 	. = ..()
--- a/code/modules/mob/living/silicon/ai/say.dm
+++ b/code/modules/mob/living/silicon/ai/say.dm
@@ -171,10 +171,3 @@

 #undef VOX_DELAY
 #endif
-
-/mob/living/silicon/ai/could_speak_in_language(datum/language/dt)
-	if(is_servant_of_ratvar(src))
-		// Ratvarian AIs can only speak Ratvarian
-		. = ispath(dt, /datum/language/ratvar)
-	else
-		. = ..()
--- a/code/modules/mob/living/silicon/pai/software.dm
+++ b/code/modules/mob/living/silicon/pai/software.dm
@@ -267,9 +267,8 @@
 			if(href_list["toggle"])
 				encryptmod = TRUE
 		if("translator")
-			if(href_list["toggle"])
-				grant_all_languages(TRUE)
-					// this is PERMAMENT.
+			if(href_list["toggle"])	//This is permanent.
+				grant_all_languages(TRUE, TRUE, TRUE, LANGUAGE_SOFTWARE)
 		if("doorjack")
 			if(href_list["jack"])
 				if(cable && cable.machine)
--- a/code/modules/mob/living/simple_animal/bot/bot.dm
+++ b/code/modules/mob/living/simple_animal/bot/bot.dm
@@ -911,7 +911,6 @@ Pass a positive integer as an argument to override a bot's default speed.
 				bot_name = name
 				name = paicard.pai.name
 				faction = user.faction.Copy()
-				language_holder = paicard.pai.language_holder.copy(src)
 				log_combat(user, paicard.pai, "uploaded to [bot_name],")
 				return TRUE
 			else
--- a/code/modules/mob/transform_procs.dm
+++ b/code/modules/mob/transform_procs.dm
@@ -425,6 +425,7 @@
 		mind.transfer_to(new_xeno)
 	else
 		transfer_ckey(new_xeno)
+	update_atom_languages()

 	to_chat(new_xeno, "<B>You are now an alien.</B>")
 	. = new_xeno
--- a/code/modules/power/supermatter/supermatter.dm
+++ b/code/modules/power/supermatter/supermatter.dm
@@ -249,7 +249,7 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_crystal)
 	add_overlay(causality_field, TRUE)

 	var/speaking = "[emergency_alert] The supermatter has reached critical integrity failure. Emergency causality destabilization field has been activated."
-	radio.talk_into(src, speaking, common_channel, language = get_default_language())
+	radio.talk_into(src, speaking, common_channel, language = get_selected_language())
 	for(var/i in SUPERMATTER_COUNTDOWN_TIME to 0 step -10)
 		if(damage < explosion_point) // Cutting it a bit close there engineers
 			radio.talk_into(src, "[safe_alert] Failsafe has been disengaged.", common_channel)
--- a/code/modules/projectiles/projectile/magic.dm
+++ b/code/modules/projectiles/projectile/magic.dm
@@ -228,7 +228,6 @@

 	if(!new_mob)
 		return
-	new_mob.grant_language(/datum/language/common)

 	// Some forms can still wear some items
 	for(var/obj/item/W in contents)
--- a/code/modules/research/xenobiology/crossbreeding/_status_effects.dm
+++ b/code/modules/research/xenobiology/crossbreeding/_status_effects.dm
@@ -959,9 +959,10 @@ datum/status_effect/stabilized/blue/on_remove()
 		familiar = new linked.mob_type(get_turf(owner.loc))
 		familiar.name = linked.mob_name
 		familiar.del_on_death = TRUE
-		familiar.copy_known_languages_from(owner, FALSE)
+		familiar.copy_languages(owner, LANGUAGE_MASTER)
 		if(linked.saved_mind)
 			linked.saved_mind.transfer_to(familiar)
+			familiar.update_atom_languages()
 			familiar.ckey = linked.saved_mind.key
 	else
 		if(familiar.mind)
--- a/code/modules/research/xenobiology/xenobiology.dm
+++ b/code/modules/research/xenobiology/xenobiology.dm
@@ -684,7 +684,7 @@
 		if(SM.flags_1 & HOLOGRAM_1) //Check to see if it's a holodeck creature
 			to_chat(SM, "<span class='userdanger'>You also become depressingly aware that you are not a real creature, but instead a holoform. Your existence is limited to the parameters of the holodeck.</span>")
 		to_chat(user, "<span class='notice'>[SM] accepts [src] and suddenly becomes attentive and aware. It worked!</span>")
-		SM.copy_known_languages_from(user, FALSE)
+		SM.copy_languages(user)
 		after_success(user, SM)
 		qdel(src)
 	else
--- a/code/modules/ruins/lavaland_ruin_code.dm
+++ b/code/modules/ruins/lavaland_ruin_code.dm
@@ -133,7 +133,7 @@
 	assignedrole = "Lavaland Syndicate"

 /obj/effect/mob_spawn/human/lavaland_syndicate/special(mob/living/new_spawn)
-	new_spawn.grant_language(/datum/language/codespeak)
+	new_spawn.grant_language(/datum/language/codespeak, TRUE, TRUE, LANGUAGE_MIND)

 /datum/outfit/lavaland_syndicate
 	name = "Lavaland Syndicate Agent"
--- a/code/modules/surgery/organs/tongue.dm
+++ b/code/modules/surgery/organs/tongue.dm
@@ -64,8 +64,8 @@
 		owner.RegisterSignal(owner, COMSIG_MOB_SAY, /mob/living/carbon/.proc/handle_tongueless_speech)
 	return ..()

-/obj/item/organ/tongue/could_speak_in_language(datum/language/dt)
-	return is_type_in_typecache(dt, languages_possible)
+/obj/item/organ/tongue/could_speak_language(language)
+	return is_type_in_typecache(language, languages_possible)

 /obj/item/organ/tongue/lizard
 	name = "forked tongue"
@@ -141,7 +141,7 @@
 /obj/item/organ/tongue/abductor/handle_speech(datum/source, list/speech_args)
 	//Hacks
 	var/message = speech_args[SPEECH_MESSAGE]
-	var/mob/living/carbon/human/user = usr
+	var/mob/living/carbon/human/user = source
 	var/rendered = "<span class='abductor'><b>[user.name]:</b> [message]</span>"
 	user.log_talk(message, LOG_SAY, tag="abductor")
 	for(var/mob/living/carbon/human/H in GLOB.alive_mob_list)
@@ -260,7 +260,7 @@
 	maxHealth = 100 //RoboTongue!
 	var/electronics_magic = TRUE

-/obj/item/organ/tongue/robot/can_speak_in_language(datum/language/dt)
+/obj/item/organ/tongue/robot/could_speak_language(language)
 	return ..() || electronics_magic

 /obj/item/organ/tongue/robot/handle_speech(datum/source, list/speech_args)
--- a/modular_citadel/code/modules/language/sylvan.dm
+++ b/modular_citadel/code/modules/language/sylvan.dm
@@ -1,23 +0,0 @@
-// The language of the vinebings. Yes, it's a shameless ripoff of elvish.
-/datum/language/sylvan
-	name = "Sylvan"
-	desc = "A complicated, ancient language spoken by vine like beings."
-	speech_verb = "expresses"
-	ask_verb = "inquires"
-	exclaim_verb = "declares"
-	key = "h"
-	space_chance = 20
-	syllables = list(
-		"fii", "sii", "rii", "rel", "maa", "ala", "san", "tol", "tok", "dia", "eres",
-    	"fal", "tis", "bis", "qel", "aras", "losk", "rasa", "eob", "hil", "tanl", "aere",
-    	"fer", "bal", "pii", "dala", "ban", "foe", "doa", "cii", "uis", "mel", "wex",
-    	"incas", "int", "elc", "ent", "aws", "qip", "nas", "vil", "jens", "dila", "fa",
-    	"la", "re", "do", "ji", "ae", "so", "qe", "ce", "na", "mo", "ha", "yu"
-	)
-	icon = 'icons/obj/hydroponics/harvest.dmi'
-	icon_state = "lily"
-	default_priority = 90
-
-/datum/language_holder/venus
-	languages = list(/datum/language/common, /datum/language/sylvan, /datum/language/machine)
-	only_speaks_language = /datum/language/sylvan
--- a/modular_citadel/code/modules/reagents/chemistry/reagents/SDGF.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/reagents/SDGF.dm
@@ -110,7 +110,7 @@ IMPORTANT FACTORS TO CONSIDER WHILE BALANCING

 				to_chat(M, "<span class='warning'>You feel a strange sensation building in your mind as you realise there's two of you, before you get a chance to think about it, you suddenly split from your old body, and find yourself face to face with yourself.</span>")
 				M.visible_message("[M] suddenly shudders, and splits into two identical twins!")
-				SM.copy_known_languages_from(M, FALSE)
+				SM.copy_languages(M, LANGUAGE_MIND)
 				playerClone =  TRUE
 				M.next_move_modifier = 1
 				M.nutrition -= 500
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -2143,6 +2143,7 @@
 #include "code\modules\language\ratvarian.dm"
 #include "code\modules\language\slime.dm"
 #include "code\modules\language\swarmer.dm"
+#include "code\modules\language\sylvan.dm"
 #include "code\modules\language\vampiric.dm"
 #include "code\modules\language\xenocommon.dm"
 #include "code\modules\library\lib_codex_gigas.dm"
@@ -3342,7 +3343,6 @@
 #include "modular_citadel\code\modules\custom_loadout\custom_items.dm"
 #include "modular_citadel\code\modules\custom_loadout\load_to_mob.dm"
 #include "modular_citadel\code\modules\custom_loadout\read_from_file.dm"
-#include "modular_citadel\code\modules\language\sylvan.dm"
 #include "modular_citadel\code\modules\mentor\dementor.dm"
 #include "modular_citadel\code\modules\mentor\follow.dm"
 #include "modular_citadel\code\modules\mentor\mentor.dm"
--- a/tgui-next/packages/tgui/interfaces/LanguageMenu.js
+++ b/tgui-next/packages/tgui/interfaces/LanguageMenu.js
@@ -86,7 +86,9 @@ export const LanguageMenu = props => {
                {' '}
                  Key: ,{language.key}
                {' '}
-                {!!language.shadow && '(gained from mob)'}
+                {language.can_understand
+                  ? 'Can understand.'
+                  : 'Cannot understand.'}
                {' '}
                {language.can_speak ? 'Can speak.' : 'Cannot speak.' }
              </LabeledList.Item>
--- a/tgui-next/packages/tgui/public/tgui.bundle.js
+++ b/tgui-next/packages/tgui/public/tgui.bundle.js