So, I have translated my theme with the Loco Translate plugin, and now I need give opportunity for unauthorized users to choose the language which they want to use. I see that WordPress uses .mo files which language index coincide with locale language.
If the language of my site is ru_Ru, then WP will use ru_Ru.mo, right? How I can implement opportunity of choice for users?
P.S. I know about WPML plugin,and about multisite too. =) I'm just trying to solve this task.