Don't know it's possible or not, but why not make some quests and/or spells be done in a different language. Ex: Must be a master of Elder Dragon to understand a quest some NPC is giving you, or must be proficient in Orcish to understand and scribe new spells implemented. Would make it more crucial to learn different languages and practice them with other ppl and give a use to the 15 languages that I know lol. 