[ianjakobs]

The service I use for automatic corrections is LanguageTool (https://languagetool.org/), and they support Chinese. It's hard for me to judge the accuracy, but I know that for Spanish it's good at picking up grammar and spelling mistakes.

[xvilka]

I just tried very simple inherently wrong Chinese phrase "我学校中文。" and it found no mistakes in it. I expected it at least point to the error or even suggest to correct the second word to become "我学习中文。"