Merge pull request #6819 from Meghan-Rossi/languagetests

Makes language keys case sensitive, adds unit tests for language conflicts, fixes some language conflicts

code/modules/mob/language/monkey.dm

@@ -4,7 +4,7 @@
 	speech_verb = "chimpers"
 	ask_verb = "chimpers"
 	exclaim_verb = "screeches"
-	key = "6"
+	key = "C"
 	syllables = list("ook","eek")
 	machine_understands = 0
 
@@ -71,7 +71,7 @@
 	speech_verb = "chirps"
 	ask_verb = "tweets"
 	exclaim_verb = "squawks"
-	key = "m"
+	key = "B"
 	flags = RESTRICTED
 	machine_understands = 0
 	space_chance = 100

code/modules/mob/say.dm

@@ -144,7 +144,7 @@
 		return GLOB.all_languages["Noise"]
 
 	if(length(message) >= 2 && is_language_prefix(prefix))
-		var/language_prefix = lowertext(copytext(message, 2 ,3))
+		var/language_prefix = copytext(message, 2 ,3)
 		var/datum/language/L = GLOB.language_keys[language_prefix]
 		if (can_speak(L))
 			return L