1) No because you have to give each player access to a language they can understand. If each language is on one character sheet, then a player with access to that character sheet would understand ALL languages. 2) It depends on what you mean. If it is simply random gibberish, then yes you could put gibberish into a rollable table and you could roll on the table each time you speak in a language. However if you want specific gibberish to be output for a language, then no you would need multiple tables, one for each language