"enter at least *undefined* characters" when about to comment in the mobile site
40874
Empty comment field has notice "enter at least undefined characters"
68817
How to comment part of a line?
149337
Question titles showing up as "undefined"
144201
Can I place  in a comment?
119083
"add/show X comments" link on mobile scrolls, zooms and opens keyboard
98970
.answered-accepted style isn't defined in StackOverflow mobile site
100100
Accented tags not displayed properly on edit page on mobile web site
8665
iOS 11-13 - unable to paste into comments
56444
Add a reply to comment button or @ autocompletion when using Chrome on Android
134869
URL should not count towards a comment's character count
9626
Formatting Keyboard Shortcuts for Comments
113721
Why comment reply auto-completion feature (@) sometimes doesn't work?
42657
How do I remove the little × that shows up in the frontend when typing?
128064
Is the @reply in a comment to the editor of a post broken?
104802
Don't count non-printing characters, HTML comments or other content not displayed toward minimum character requirements
96946
I'm getting "Your post appears to contain code that is not properly formatted as code" when there isn't any code in the post
70875
Comment flags are broken