How to make a multilingual wordpress template without content translation?

Question

Internationalization and localization

Is there a plugin that translates the template itself without the need to translate the content?
For example: plugins like polylang, wpml allow users to navigate only through pages that have translation.
I also need the user to select the language of the "interface", and all internal content remains in their native language.

Answer 1

There used to be a Google Translator Website. Now I don't know if it works.

Answer 2

Yes, there is Loco Translate .
But the theme / plugin itself must be ready for localization (functions __(), _e(), etc. are used, textdomain is correctly specified).