I can confirm that the GOG version has the option for hungarian (magyar) as well.

German
English
Spanish
French
Hungarian
Italian
Korean (I guess)
Polish
Russian
Turkish
Japanese
Chinese

Perfect, thanks the lot! Then the only issue of the game is the lack of a discount bundle

Residual was already removed from the list.

Alien Shooter 2: Reloaded has now the Russian language available.

Both Earthworm Jim 1 & 2 have received their Mac and Linux builds on GOG

On the spreadsheet, change the name of " M.A.X. " to " M.A.X. + M.A.X. 2 " and then specify that only the first game as that issue. They're no longer available for individual purchase.

As for the Realms of Arkania trilogy for DOS, why is the absence of a Dosbox Linux version indicated as "unconfirmed"? The store pages on GOG very clearly don't indicate that there's a Linux Dosbox available for download, how is confirmation needed?

Elderborn It is not possible to buy the artbook or the OST individually, but the bundle to get both of them is the "Metal AF edition" and is currently available on GOG, identical to the one on Steam. The current wording of the entry is unclear and sounds like the entire content of the "Metal AF Edition" is just not available at all on GOG, which is not the case.

Symphony from Empty Clip Studio and Toren from Swordtales were delisted from GOG.

I know that the owner of the spreadsheet is keeping track of this thread, but still, I decided to gather all recent updates on pastebin. Could be useful for other users who have lost track of recent updates.