WordPress Polylang Get Language

<?php // returns the WordPress locale in the format ‘en_US’ $locale = get_locale(); // returns the locale in the format en-US $language = get_bloginfo( 'language' ); // current displayed language $cur_language = pll_current_language( 'slug' ); // default language $default_language = pll_default_language( 'slug' ); // get translated post using slug $t_post = pll_get_post($post_id, $slug); // get post's language as slug $post_lang = pll_get_post_language($post_id, 'slug'); /* Array ( [locale] => zh_TW [language] => zh-TW [cur_language] => zh_tw [default_language] => en ) Array ( [locale] => en_US [language] => en-US [cur_language] => en [default_language] => en ) */