If it automatically logs you into an account, click the icon in the upper-right corner and click "Yes" when it asks you if you want to quit. It should display the homepage. Now click on "Play", and it should display the login screen. Next time, don't check the "Remember me" box if you wish to be asked to login to your account(s) every time you open Tanki Online.
how do you change your brazillian tanki account into english account?
you can't transfer your accounts from the brazilian server.
Customer support service by UserEcho