Erik-
To avoid duplicate work, you could say
something like
"I copyedit [[User:Engrish]]'s
changes"
to your user page and possibly other relevant pages.
There must be some cyberspace law about everyone's English ending up
garbled in all discussions that criticize other people's English. This
should of course be "add to", not "say to", since the Wikipedia speech
interface is still in alpha.
Regards,
Erik