I tried several times to subscribe for a conversation with TeacherNia and It seems impossible. Can you check this problem for me. Thank you.
@Margopel - there is an issue in our translation system which causes this problem with interface languages other than English. We are working on it now. Meantime, would you change your interface language from French to English on your settings page http://www.lingq.com/accounts/settings/? After that, you should be able to sign up for a conversation. Sorry for the inconvenience!