Characters for non-English text but looks like ASCII letters.

[be5invis]

Like Cyrillic letters, Greek question mark, CJK full-width punctuations.
Only mark them in code though.

[nhoizey]

@be5invis hello, sorry for the very late answer, trying to catch up on all opened issues.

These would be useful indeed, but I would like to make Gremlins easily configurable before, so that people have the opportunity to decide which characters to look for.

Anyway, would you have a page somewhere listing all these characters?

[be5invis]

Here are some examples I know:

• Greek question mark U+037E (;);
• Curly quotes (U+2018 — U+201F);
• Characters in “Halfwidth and Fullwidth Forms” block (U+FF00 — U+FFEF);

For these characters:

• If they occur in code, report error.
• If they occur in strings or comments, notify the user.

[nhoizey]

A few additional characters:
https://twitter.com/aemkei/status/1146884713371578369

Regarding context aware choice between error and warning, I'm not sure how to proceed.