Khan Academy doesn't offer language courses. What I would recommend is going to DuoLingo! It does not have Pashto to French, but it does have English to French.

I tried Duolingo, to improve my French (from English). It has many problems.

• Far too many adverts.
• Quality drops after have to register point.
• I was focusing more on English, than French: You read the french, and translate, but then have to workout the English, by moving words into sentences. The translations are not exact, so you are trying to work out a way to say it in English.
  One example asked to translate “it goes good, and you?” (direct translation from the original French). I selected “I am well how are you”, and was told that I was wrong. I was told that the correct answer is “A am doing well and you”. I would say that both are equally correct.

If anyone knows of anything better (like khan academy), then please tell me.

I'd highly recommend Pimsleur, especially the premium subscription, it is somewhat pricey BUT very worth it. Combine that with some sort of flash card system and you should see much improvement