How to change language file used by _e function

Actually you need to hook in the ‘locale’ filter to set the language you want: add_filter(‘locale’, function($locale) { return esc_attr($_GET[‘language’]); }); Then in the links of your switch, you need to pass the language variable: <a href=”https://wordpress.stackexchange.com/questions/260015/<?php echo add_query_arg(“language’, ‘xx_XX’) ?>”>XX</a> Where xx_XX is the language locale code for language XX