Changing my username
i want to change my username and every time i do it i get one reply "Invalid Username" ! how can i change it ?
Your name can't have certain symbols in it. (eg "+" or "/").
Also you can't have the same username as anybody else.
If you want to test if an username is already taken try:
(www.duolingo.com/NameOfUsernameYouWantToTry). (Don't click that link, lol). If the username is taken you should enter a user page. If it isn't taken you should receive an "error 404" message.