There are two places in the support portal where you can change your language setting.
At the top right corner, you can choose the language you see FAQ:s and the ticket fields in. This setting can be changed before logging in to the portal.
You can also change the language under Edit profile. This will affect some of the automatic e-mails you get from the Palette Software Support Portal. Changing the language setting on your profile will also change the language setting on the front page.