How do I get rid of it?
(I live in Belgium which is a multi language county but I'm still horrible at French so I wanna turn it off)

edit:
All the promotion bundles are, like this one:
https://www.gog.com/promo/20170606_summer_sale_la_collection_de_gameblog_fr

Gog, not only cheap, but educational.

At the top of the screen, hover over your GOG username, and you should see a dropdown menu. Go to Languages & Currency, and change it from French to whatever option you prefer.

Yeah and also incredibly annoying ^^ That's the problem, it's on English.
The whole GOG site in English, except the promotion bundles.

Et quel est le problème au juste? Le français, y'a que ça de vrai.

AHHHHH ITS SPREADING This changes nothing, it's on English but I still get constantly redirected to the french pages.

Try to clear your browser cache, also do you have some add-on on your browser that disable cookie ?

I have a similar issue (I live in Switzerland and Gog insist on showing me the German page even though I don't speak German) but normally if you are logged on and change the language once it should remember it.

Have you met GOG's new CEO?

Nope nope nope. The "influencer" promo blocks are purely location-dependent and don't give a crap about language settings.

Also, language is set in the stalker bar these days.

Won't work and no. Looks French enough
Promos give the nicest finger of them all to our language preferences.

Ouch! Not good, GOG :-( That is one of the most annoying things I know when they pick the language from your location. Just because I happen to visit Moscow does not mean I know Russian (not actually visiting Moscow today but I could be).

EDIT: If fixed: My apologies are offered.

I noticed this yesterday when Maxvorstadt posted a screencap of some collections from German gaming sites that I didn't think I remembered being there when I looked through all the collections.
Sure enough, today I went through and changed my language to each of the supported ones, checking the list of collections each time: no change (apart from the title GOG's in-house recommendations). Now this thread and one from a Brazilian user have confirmed "geo-tailoring" of the site with links to other region-specific collections that I don't have on "my" front page.

Well, I have the same "issue", but as a matter of fact just the title of the bundle is in french. Not a big deal then (in a way of speaking).

EDIT - And when I came back to the shops just after writing this post, the bundle titles were English. I did nothing special. And they were in french since the beginning. Weird.