Hi! I found a way to use Korean text that fits inside one 8px row! It will only work in the next version of GB Studio though, since it has variable width (I can fit in more characters). I don't know if it'll be able to use it though, so for now it's just an idea.
The first tile has ㄷ and ㅗ , the second one has ㅐ and ㄴ. I've done the math and I'll need over 230 tiles, but I'll be able to use more in the next update, so it should work.
The main problem is still the converter, I can't convert a hangul block into its individual jamo letters to analyze, at least not for now. The Unicode math method is not available in CTF yet. Still, if I somehow get to split it, I'd need to figure out more complicated stuff.
I can add individual jamo letters right now, it's nothing impressive, but it's a good start, I believe.