The intent is that it is mostly pretty opaque and mysterious, drawing from the sense of discovery I enjoyed about games like Digimon World and SA2's Chao Garden.
There's actually a boolean I intentionally hardcoded at the end that flips the game into displaying in english, as it was developed to display all numbers in base 8 and all text in Lintwese! I figured that was maybe a little rough on people so I added a small tutorial and changed it back to english.
If you're looking for specific answers or how-tos, though, feel free to ask here and I'll provide instruction as best I can; I'm happy to do write ups on specific features or items if they're perhaps being a little more puzzling than intended!