GrĂ¼ss dich Reinhard,
Thanks for reaching out!
I checked your other thread, we are aware of that issue, it was flagged to us not long ago. There is already a ticket to get that string fixed / separated.
Until then to disable automatic updates for translations, paste this into your functions.php file:
add_filter( 'auto_update_translation', '__return_false' );
You can find more info about this here:
https://codex.wordpress.org/Configuring_Automatic_Background_Updates
Also they recommend that the best place to put these filters is in a must-use plugin.
Let me know if this helps.
Cheers,
Andras