[jurialmunkey]

Understand!
If you manually add a fallback language they will take more time to load only if user are in a language that no have text? If the answer is yes, I think is better take a little more time to load and get text, than load more fast and get nothing.

Not with the way the plugin is currently written. I would have to rewrite significant portions of my code to achieve what you are suggesting.
If I get around to rewriting the code for a v2, then I will consider adding in a fallback language.

For the time-being, if you want to use languages other than the default, then the best approach is to edit TheMovieDb page and add the missing information (which you should do anyway considering it is a free resource which relies on volunteers to exist).