Unable to change auth email "preview" message in templates

Unfortunately I have not been able to change the initial sentence in the auth emails with custom smtp added in Appwrite. They are not included in the editable template menu in the dashboard. My whole email is in polish language and only this uneditable part is in english for some reason.

Let me know if there is something I can do about it. Already tried changing the template language to polish, but after refreshing the dashboard page, it is again english as the template language (may be only UI issue though, my templates text are also not rendered correctly, but I receive emails in polish).

It's rather not about device language or something related, because in email source code I can clearly see my polish message and the first sentence in english.