If you've ever wanted to learn a language but don't want to be tethered to a PC or stuck in some classroom, this might be your lucky day. Rosetta Course has just launched on Android, and you can try it out for free. You are welcome to choose from more than a dozen languages to explore, but only the first few lessons are available without paying up.
Rosetta Course uses a combination of text, images, and speech to help you learn the ins and outs of a new language. The speech features should work on almost all devices, and those with a stylus can also do writing exercises.