title: Switch language in Wordpress Polylang plugin from outside
body: <p>I have a site build with Laravel 5.5, which has admin cabinet on WordPress (that was clients demand). And we were asked to add an ability to switch languages.</p>
  
  <p>Tons of code in javascript and some static front-end data we already translated using the dictionary in database and session variable. Change language - change session variable - the same dictionary as a multilevel array gives us translated strings.</p>
  
  <p>But we stuck to translating dynamic data from WordPress, posts, custom posts, menus. Already installed Polylang plugin. But it has its own language switcher.</p>
  
  <p>We need to use same sessions for already working translations and somehow imitate polylang language switcher. Tried using pll_set_post_language and same functions, but we need to add WordPress functionality on the frontend for that, using wp-load.php, but it is conflicting with laravel (same classes, function names). Is there any way to emit polylang language change from outside of WordPress?</p>