babbel

dil öğrenme işinde en iyisi diyebilirim internet siteleri ayrı bir güzeldir.

sitesinde şöyle bir şey var .:

"invite people to join babbel with your personalized link. any friend who uses the link to register with us will get one whole week of language learning for free. and you too will receive one free week for every friend who registers with us via your link.*

* only with confirmed emails to minimize spam"