The sentiment you have is fine, but if you really wanted to you could rewrite it like this:
If you wish to contact me by email, by all means do so to miguelmurca+autoref [æt] cumperativa.xyz - I may not be able to respond. If I don't please don't try to find other emails to send to me, as I'll not respond to those, either, and just delete them. This post is in English. If you wish to write me, please do so in English. Other languages will be deleted.
(The key is assholes won't read it anyway, so there's no reason to snark them, just delete.)
If you wish to contact me by email, by all means do so to miguelmurca+autoref [æt] cumperativa.xyz - I may not be able to respond. If I don't please don't try to find other emails to send to me, as I'll not respond to those, either, and just delete them. This post is in English. If you wish to write me, please do so in English. Other languages will be deleted.
(The key is assholes won't read it anyway, so there's no reason to snark them, just delete.)