Hail Lii'dra (#17925)

* fsad

* uihj

code/modules/mob/language/language.dm

@@ -190,22 +190,65 @@
 	SHOULD_NOT_SLEEP(TRUE)
 	return TRUE
 
-// Language handling.
-/mob/proc/add_language(var/language)
+/**
+ * Adds a language to the known ones for the mob, returns `TRUE` if added successfully, `FALSE` otherwise
+ *
+ * Does NOT make it the default language
+ *
+ * * language - The language to add, can either be a `/datum/language` or a string, see the LANGUAGE_* defines in `code\__defines\species_languages.dm` for the strings
+ */
+/mob/proc/add_language(language)
+	SHOULD_NOT_SLEEP(TRUE)
+
 	var/datum/language/new_language
 	if(istype(language, /datum/language))
 		new_language = language
 	else
 		new_language = all_languages[language]
 
-	if (!istype(new_language) || !new_language)
-		CRASH("ERROR: Language [language] not found in list of all languages. The language you're looking for may have been moved, renamed, or removed. Please recheck the spelling of the name.")
+	if(!istype(new_language) || !new_language)
+		crash_with("ERROR: Language [language] not found in list of all languages. The language you're looking for may have been moved, renamed, or removed. Please recheck the spelling of the name.")
 
 	if(new_language in languages)
-		return 0
+		return FALSE
 
 	languages.Add(new_language)
-	return 1
+	return TRUE
+
+/**
+ * Set default language for a `/mob/living`, return `TRUE` if set successfully, `FALSE` otherwise
+ *
+ * * language - The language to set as default, can either be a `/datum/language`, a string as per `LANGUAGE_*` defines in `code\__defines\species_languages.dm`,
+ * or `null` to remove the default language
+ */
+/mob/living/proc/set_default_language(language)
+	SHOULD_NOT_SLEEP(TRUE)
+
+	var/datum/language/new_default_language
+	if(istype(language, /datum/language))
+		new_default_language = language
+	else
+		new_default_language = all_languages[language]
+
+	if(!isnull(new_default_language) && !istype(new_default_language))
+		stack_trace("ERROR: Language [language] not found in list of all languages. The language you're looking for may have been moved, renamed, or removed. Please recheck the spelling of the name.")
+		return FALSE
+
+	if(!isnull(new_default_language) && !(new_default_language in languages))
+		stack_trace("Trying to set a default language that is not known by the mob! The language must first be added for it to be set as default!")
+		return FALSE
+
+	default_language = new_default_language
+	return TRUE
+
+//Silicons can only speak languages listed in the `speech_synthesizer_langs`, even if they can understand more
+/mob/living/silicon/set_default_language(language)
+
+	//Return FALSE if they can't speak this language
+	if(!(language in speech_synthesizer_langs))
+		return FALSE
+
+	. = ..()
 
 /mob/proc/remove_language(var/rem_language)
 	var/datum/language/L = all_languages[rem_language]

code/modules/mob/language/station.dm

@@ -318,7 +318,9 @@
 /datum/language/bug/check_speech_restrict(var/mob/speaker)
 	var/mob/living/carbon/human/H = speaker
 	var/obj/item/organ/internal/vaurca/neuralsocket/S = H.internal_organs_by_name[BP_NEURAL_SOCKET]
-	if(S.muted || S.disrupted)
+
+	//Black k'ois zombies don't have neural sockets but need to talk, hence check if the socket exists, or it will runtime for them
+	if(S && (S.muted || S.disrupted))
 		to_chat(speaker, SPAN_WARNING("You have been muted over the Hivenet!"))
 		return FALSE
 	else