Even though the framerate is incredibly low, it's rather consistent. If this is your only way to play it and you're interested, it's completely doable for a game that's less than an hour to play entirely through. I attempted swapping to Proton Experimental & Proton 9.0, but the framerate and audio issues still occur.

To change to English:

• Select "Options" (Fourth down on Main Menu; first "small bubble")
• Select "Display" (Second from the left in Options Menu; hit RB/E key once)
• Go to the last toggle and change it. English and Japanese are the only two languages, and it takes a split second for it to register the language swap.