[Kanbab]

That's how I learned Hebrew. There was a service I used, I forget what it was, but it was definitely useful. Essentially I would just login at a scheduled time with my tutor and we would practice Hebrew, her native language. It was pretty expensive, and if I didn't have a scholarship to learn Hebrew at the time, I probably wouldn't have been able to afford it.

It would be interested if... You could "earn" credits by teaching someone your language, which could be redeemed to learn a language from someone else. It is a workable business model where you basically get teachers for "free" and a certain portion of the users pay into it to get credits.