Yeah, I don't speak chinese, but there are many european languages that use accents to change sounds of vowels. In portuguese, the difference between grandmothe

Yeah, I don't speak chinese, but there are many european languages that use accents to change sounds of vowels. In portuguese, the difference between grandmother (avó) and grandfather (avô) is just in how you pronounce the o. I am extremely skeptical that any language that humans speak could be impossible to create a phonetical writing system for. It may need features that the latin alphabet lacks, but it should be possible.