It has nothing to do with editing the page, The wrong email goes out when the page is marked for translation, which you can see in the log here: https://www.mediawiki.org/wiki/Special:Log?type=&user=&page=Help%3AExport&wpdate=&tagfilter=

Well OK but the "victim" looks up and down, scratching his head, trying to find out what is going on.
Therefore the message should say "... has been marked for translation."
Or perhaps most users don't need to be notified about that, so it should be an opt-in preference.

In T237488#5638933, @Jidanni wrote:

Well OK but the "victim" looks up and down, scratching his head, trying to find out what is going on.
Therefore the message should say "... has been marked for translation."
Or perhaps most users don't need to be notified about that, so it should be an opt-in preference.

"Email me when a page or a file on my watchlist is changed" preference, which I believe caused the above email is already opt-in on Wikimedia sites.

Well in Preferences I had

• Email me when a page or a file on my watchlist is changed
• Email me also for minor edits of pages and files

And they didn't "change" the page itself.
Or certainly it is a more minor change than even adding a comma.
In any case, seems a new third checkbox (default off) should be added:

• Email me when a page or file has been marked for translation, (etc.)

And the email needs to say that the page was marked for translation, else the user will hunt around looking for some added words.

In T237488#5639007, @Jidanni wrote:

Well in Preferences I had

• Email me when a page or a file on my watchlist is changed
• Email me also for minor edits of pages and files

And they didn't "change" the page itself.
Or certainly it is a more minor change than even adding a comma.

This is now turning to semantics of what constitutes "change" to a page. It does not matter what the action is, as long as it affects the page it's being recognized as 'edit' for the notification purpose whether the action action visually changes the page or not is not relevant. And also you explicitly checked it, it's unchecked by default.

And they didn't "change" the page itself.

It did change the page. Prior to the "edit" that triggered the email to you; there are actions that cannot be done on the page.

In any case, seems a new third checkbox (default off) should be added:

• Email me when a page or file has been marked for translation, (etc.)

And the email needs to say that the page was marked for translation, else the user will hunt around looking for some added words.

Then this has to be separately provided by the MediaWiki-extensions-Translate extension. So has to be requested in a dedicated task.

Dupe of T44457: Email notification does not distinguish most log actions from edits or T44458: Allow each log action to set whether to send email notification and with which subject/body.

(Yes, not a bit nor byte nor checksum was changed. So don't tell the user "The MediaWiki page Help:Export has been changed." There are plenty of better words to use in the dictionary.)