I've updated Finnish now.
FI: Finnish
Also I've searched through and found ones that appear to have had translation updates in the past years but the updates were not put on the website. The page suggests to email Victor if you have done any updates but these days he might not see such an email, so it's better to post here or write to tech support, then I will update it.
For translations in that situation, I found and updated:
BG: Bulgarian
ES: Spanish (Castellano)
FR: French
HU: Hungarian
I also found Korean had a couple of new updates so made it live although it is incomplete. I guess it's more complete that what was there before.
KO: Korean
About the CLIENT ID / CLIENT SECRET - I don't think they are really worth translating as the rest of
that page is not translated. It looks like those lines were marked as translatable by mistake.
One line is missing from all translations - the "Events" tab that I added to replace "Leagues". But it's done differently from all the other text so I don't know how to update it yet.