Just released my game a while ago. You can find it here:
https://itch.io/jam/igmc2018/rate/336957
It is a jrpg in a setting of Norse mythology. A big part of the game is learning the language of the world you travel to, which has implications both for understanding what people say but also for combat, as learning a characters language gives them a cooperative benefit.
Key features:
Player has a language value which goes down as time passes, which can be recharged.
Player also has a comprehension level for each language they understand, denoting in percentage the minimum amount of understanding they can have when talking to people speaking that language. At the moment the only language working is the Aesir language, although another language is programmatically implemented (and more are intended).
Language comprehension levels in action:
Player gets weaker as he performs actions (at the moment the only action in question is movement). Player needs to rest at an inn or elsewhere to recuperate to maximum performance.
As I am the only one to have tried it so far, I am welcoming any feedback on the game (positive or negative)!