Two of my big interests meet in an article by Olle Linge, "Role-Playing as a way to expand your Chinese." Though short, it brings up a bunch of fun ideas for use role playing as a way to teach/learn Chinese, or any language for that matter. In many discussion of games and education, social studies or math gets most of the attention, so I'm happy to run across an article that looks at language learning in this vein.
I'm sure we can come up with more scenarios for role playing with languages. Some, obviously, require more vocabulary or a better grasp of grammar and constructions, but these sorts of scenes would give many learners greater motivation to explore the language of study.
See my earlier review to learn how the new RPG, Magicians, uses foreign language study even more intensively.
Have a fun weekend!