Fix language keys not working after multilingualism

Sort of a "fix", sort of a tweak; the system deliberately never checked
for anything but the lowercase version of a language key to make it
easier to use, but a lot of the VOREStation languages use uppercase
invocation keys. Easy enough to fix by just making it check for the
literal version of the key instead of the lowertext version.

code/modules/mob/say.dm

@@ -153,7 +153,7 @@
 	var/list/prefixes = list() // [["Common", start, end], ["Gutter", start, end]]
 	for(var/i in 1 to length(message))
 		// This grabs trimmed 3 character substrings, to allow for up to 1 prefix and 1 letter language keys
-		var/selection = trim_right(lowertext(copytext(message, i, i + 2)))
+		var/selection = trim_right(copytext(message, i, i + 2)) // VOREStation Edit: We use uppercase keys to avoid Polaris key duplication, but this had lowertext() in it
 		// The first character in the selection will always be the prefix (if this is a valid language invocation)
 		var/prefix = copytext(selection, 1, 2)
 		var/language_key = copytext(selection, 2, 3)