I would appreciate it if you could help me with the translation. https://crowdin.com/project/disable-tab-close
It is possible to mark the title of a locked tab, but it cannot be perfect. Because the web page itself can dynamically change the title. It is also possible to display an icon in the address bar. I'm not willing to make it because I don't need that feature, but I'll consider making it happen if someone makes a donation.

You seem to have translated something, but I don't know what part of the translation it is. I don't know the correspondence with the original text. Well let's wait for someone to translate it on Crowdin.