Yo, i'm having a simillar experience with sayooshi
There is a spanish patch for it rn, so i'm using it to go through the vn, my native language is portuguese which is very similar to spanish, and i also had a lot of spanish classes back in middle/highschool, but my knowledge isn't that good yet, so i'm reading with a dictionary and google translator by my side, and as you said it really is a worth experience, the uncanny music and setting are absolutely one of the best things i saw in my entire life
Also an english patch is close to completion rn, but i just can't wait for it, mostly because the autor is having some problems with the patch itself for some reason. Also using this experience to deepen my knowledge about foreign languages