In case you are wondering, the only one-star comment at the moment is from some guy crying about absence of Russian language in the game.
Doesn't GoG removes reviews like that?

Do they even pay attention to reviews when their system allow for anyone to review regardless of whether you own the product or not ?

It's a bit annoying and these "No x language" are pretty common. At least they're not as annoying as some...more, uh. "Agressive" ones.

You can sort reviews by people owning the game.

Also, yeah. Allot of butt hurt Russians tend to spam "no my language!" reviews.