I was surprised when I saw the question Chinese text isn't working on Stack Overflow. I've seen questions and answers with Chinese characters all over Stack Exchange (Skeptics, Islam, Politics, Language Learning, History, not to mention virtually every question at Chinese, and Stack Overflow meta), so I didn't even realize there is anti-spam block on Chinese characters.
The above-mentioned question was closed as a duplicate of Not all UTF-8 characters supported and Unable to post Chinese characters due to validation filter, which explains why that user encountered a block at Stack Overflow (anti-spam), but it looks like the details of the answers are not up to date.
Question: Under what conditions are 漢字 blocked?
I'm interesting in finding out:
- Which characters are blocked (e.g., Chinese, Japanese, Korean). I'm guessing it's some Unicode range.
- On which sites they are blocked.
- In which fields they are blocked (titles, question body, answers, tags, comments etc.)