Hi all - you might like to take a look at this free Steam game.
It is puzzle based but part of the puzzle is to found out how the controls work and what you have to do - deliberately there are no instructions.
While you are doing this you have to work out how to communicate with the NPCs by learning their language.
The graphics and sound are very basic, but the gameplay more than makes up for this.
For those who don't like Steam, it is available at:
http://gamejolt.com/games/missing-translation/34537I'm finding a nice change, maybe you will too.