Who invented Cantonese characters?

There is no such thing as "Cantonese for people". Why don't you like Interpretation? What's the solution?

What is an invention? The Chinese character "Dianxie" has existed since ancient times and has been handed down from generation to generation. You might as well ask who invented "why". In ancient times, "why" was actually a very vulgar saying, and there was no such word in written language. "Why" and "Why" are just different in words and expressions.

Ancient written language is different from spoken language. The "classical Chinese" you learned in middle school is actually the ancient written language. In modern times, the vernacular movement appeared, advocating the unity of written language and spoken language, that is, writing whatever you say, abolishing "classical Chinese" and standardizing spoken words such as "why", "so" and "so" in modern Chinese based on northern dialects.

Because you see "why" in modern Chinese written language, you think the word "why" looks elegant. Because Cantonese is a dialect and has no written language of its own, it is directly applied to modern Chinese based on northern dialects. Because there is no "point solution" in modern Chinese written language, you think the word "point solution" is dirty.

As for those words such as "baa" and "Ji", they are just conventional "loanwords", that is, homophones that exist only in spoken language without words and are borrowed for writing, which are not considered as "inventions".