I can't see any translated title in english?

Paris, Je T’Aime

Um, yikes? (I mean, it's probably right. But yi-kes.)

Yes, I recognize that in a French context, this looks ugly and weird. But it's in an English context, in which uncapitalized titles look weird, even when they're in a foreign language. I will admit there's a question of how to capitalize French contractions in English. Compare with the Alain Resnais film Je T’aime, Je T’aime (1968). That might be the more graceful solution. But I don't know why someone in charge here can't solve all these problems by instituting a style guide. You've provided one for French titles; are English titles not equally worthy of that care? It's an English-language site.

https://www.themoviedb.org/movie/4798-je-t-aime-je-t-aime?language=en-US

I'll just repeat that for English translated titles the important thing is that there (a) exists an actual release in a country where English is spoken and (b) what that release title is. So deciding a style for translated titles is not going to work. If we use a translated title, it's because that is the title used. We are not going to use a different title to fit it into a style guide. That said, for the most part it is going to be a fit with some kind of default English style guide.

It's also worth noting that we do support stylized titles, which is why we carry the correct title for the movie mother! while IMDb use their style guide to carry an incorrect title (Mother!). Just to give an example of where a stubborn style guide can create bad data.

(Edit: And I should say that we do follow general English style rules in almost all cases where no stylized title exists.)