[Решено] Somehow new posts are created which contain only numbers

I would like to ask for help please. My default language of posts is English, and then I translate them automatically to 6 other languages.
For some reason under the 6 other languages there keep appearing posts which contain a number sequence in the post only. The original english language does not have those.
Can you please help me understand what is wrong?
I have provided the debug info and access details to the site.