So I managed to find a few things about the new Raditz, plus extra info on his name for SSR and TUR forms. The card is dropping in a few hours so I thought we'd get a page started. If that's OK by you, I'll get it up. Trust me, the translations are fairly easy (well, that's just the TUR, the SSR may be a little tricky).
Go to your profile and click/hover over your profile pic, you should see a command that says “Edit Avatar”. Click that, then click “Upload an Avatar”, choose the pic you want as your avatar, then click “Save, I’m Done”. Be careful though, because the pic can only be 500kb max, anything over won’t work.