Refactors language holder (#48106)

* Language holder refactor

* Ironed out bugs, testing

* adds sourced language, blocking list. more useful helpers.

* Replaced old usage

* Adresses requests

* Autodoc attempt #1

* Fixed monkeyize (again)

* Travis happy

* Language menu updated

* Final pass

code/modules/mob/transform_procs.dm

@@ -458,6 +458,7 @@
 
 	new_xeno.a_intent = INTENT_HARM
 	new_xeno.key = key
+	update_atom_languages()
 
 	to_chat(new_xeno, "<B>You are now an alien.</B>")
 	. = new_xeno