So the PC version's out now on Steam, and I can't really recommend it. Besides the current lack of English language option (which we knew about), the game is still surprisingly expensive, even with a 20% launch discount, for a year-old Switch game that it's clear has had minimal effort put into the port. All of the button prompts appear to have been left unchanged from the Switch version; e.g., if your PC controller uses an Xbox layout like mine does, then all references to A actually mean B and vice versa, and the 'goal' of a stage would actually be activated with Y, rather than the X that the game displays.
I can't recommend the PC version unless it gets a serious, permanent discount (hopefully this happens when the game is updated to support English) or at least a 50% off sale, and has the button displays fixed.