How to turn off language updates completely??

Hi!

I’m using custom translations for WP core and some plugins. So I don’t want WordPress to auto update translations, and I don’t want to see any notification or message regarding translations updates available.

Is there any way to turn off translations updates completely??

I tried using this in a custom plugin:

// Disable translation updates
add_filter( 'auto_update_translation', '__return_false' );

But even with that I get translation updates notifications and my custom core WP translation is replaced by official translation again some days after replacing it… ??