working fine if selecting only text, it doesn't work as expected with pictures and tables

It works for English, but not works well for other languages. As I am a Chinese user, I tried Chinese sentences and Japanese setences and I only got garbled characters.
It seems this addon can only transfer word and serveral sentences to pdf. I tried to select whole paragraph and only got one page pdf with some sentences lost. Also pictures are missed. I wonder whether only a word or few sentences is enough for daily use.