I assumed the English version is the primary version. The game is set in the US, it's based on an American tabletop game. The plurality of the game's players will be playing the English version. Also the Bloomberg article features quotes from "CD Projekt localization director Mikołaj Szwed."
I don't know specifics of CDPRs development, but it's a reasonable assumption to make that English is the primary language, despite the studio's location.
Also the game has Kianu Reeves, his character is pretty clearly based on the actor. You wouldn't spend hollywood money to hire a hollywood film actor just to have them there to do dubbing work to replace a polish actor's performance.