List of steps to reproduce:

• I'm User:Valerio_Bozzolan logged-in on desktop with ContentTranslate enabled
• I've visited https://it.wikipedia.org/wiki/Crontab
• I've clicked on the "4 languages" button in the top navbar

What happens?:

• Problem A: ContentTranslation is suggesting to translate in "italiano" a Wikipedia article that is already in the Italian language.
• Sub-problem B: if you click on "italiano", it redirects you to this 404 page:
  • https://italiano.wikipedia.org/wiki/Special:ContentTranslation?from=it&to=italiano&page=Crontab
• Sub-problem C: if you click on "English", it redirects you to this 404 page:
  • https://english.wikipedia.org/wiki/Special:ContentTranslation?from=it&to=English&page=Crontab

What should have happened instead?:

• ContentTranslation should not suggests to translate an Italian page to "italiano", and should not redirect to unexisting Wikimedia projects.

What's going on?