This is my first question on the site. First of all I want to apologize for my bad English.
I´m migrating a site to a WordPress theme, and I need a solution to translate the theme to 3 different languages. I have the post translation on several custom post meta (title in Russian, title in Spanish, and so on). What i need is a simple solution to, based on a link, load a different theme so i can manage what to show on the site and URLs must to be viewed like