Languages now use alternative prefix keys.

Makes radio and language key overlaps possible.
It is possible to configure the default language keys server side.
Pending: The possibility for players to configure their own language keys.

code/controllers/configuration.dm

@@ -213,6 +213,8 @@ var/list/gamemode_cache = list()
 
 	var/aggressive_changelog = 0
 
+	var/list/language_prefixes = list(",","#","-")//Default language prefixes
+
 /datum/configuration/New()
 	var/list/L = typesof(/datum/game_mode) - /datum/game_mode
 	for (var/T in L)
@@ -688,6 +690,9 @@ var/list/gamemode_cache = list()
 				if("aggressive_changelog")
 					config.aggressive_changelog = 1
 
+				if("default_language_prefixes")
+					language_prefixes = text2list(value, " ")
+
 				else
 					log_misc("Unknown setting in configuration: '[name]'")