Einstein's Cats is now fully playable in Slovak, thanks to Martin Szórád (Szodrax)!
You can switch the in-game language to Slovak using the Settings screen, which is accessed on the main menu.
Build 50 - Slovak Language Update
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 18958418 · public branch
Steam updated · First observed