Thanks for your answer. I appreciate your review very well. The issue with your kind of deletions is that they do no work due to technical restrictions with our serverside workflow of import and export. Your kind of deletions can be overwritten with the old translations by automatic synchronisations every time.
If you want to delete totally wrong translations please ask at Support with the message names. I have to handle it manually. If they are outdated but not totally wrong the FUZZY is enough.