Thread:MondlichtPanda/@comment-37484301-20190513200935/@comment-3452092-20190523130507

Except the user may notice that, too. You could still contact them and instead of offering grammar lessons, maybe just say, something along the lines of "We really appreciate your edits. There are some problems with the grammar, mostly the comma placement, but don't worry if you don't know how to fix it. Commas are hard. We have some users who are good with them, so we'll just let them clean them up and you keep adding all the info you found. We just wanted to make sure you knew that we appreciate you and that the grammar corrections are nothing personal."

Do not quote me on that, because that was probably terribly worded (if sounds like it to me), but something with that general sentiment might be a good idea. Any idea on better wording?