Can we have a spell-checker and grammar-checker on Math.SE ? so that could fix all the errors that some users have because they are not native english speakers. Whether on their questions, answers, comments, etc. about mathematics.
I think we all have observed the grammar mistakes that lots of posts have, since the beginning of Math.stack. See for instance an attempt to fix this problem: Should we have an FAQ with basic math-specific English? from 2012. The last comment (yiyi's comment) in that link suggested a "spell check" feature when submitting a question or answer.
I think that would improve a lot Math.stack.
There will be no more grammar/spell mistakes when posting a question/answer/... from now on, none of us would have the need to edit such grammar/spell mistakes from now on, we could take the correctly written posts as an example* to fix all previous posts.
I once edited a title of a question using convergence of when it should have been used convergence for, but I chose of because I based my edit on an older question's title that was linked to it..
Considering some remarks from Roddy MacPhee's answer,
- Maybe the checker should not fix the 'wrong' word but suggest to fix the 'wrong' word. (underlying, with a different color and not with a straight line, the suspicious word).
- This feature could also have: punctuation-checker.
- Regarding the english dialectic, could be American english or British english, as a community we could vote to chose one of them.
Considering URL's comment,
This feature should not be considered as 'you must have it' but as an optional feature, so that it can be turned on or turned off at any time.