Translations should be saved using operations to avoid exeeding memory or time execution

Good point and thanks for the finding. I just did a test with lots of content and multiple languages and its working fine for me.

But it still needs work, since we loose the display of the translation messages, which are shown after the batch has run.
If translation job need review afterwards, the messages would look as following:

It would be great, if you could update your patch or even create a merge request with the changes.

Thanks so far.