uage from the HTTP Referer. This is used in case of ajax actions
	 * that save the term.
	 *
	 * @param string $taxonomy
	 * @param string $post_action
	 *
	 * @return null|string
	 */
	public function get_term_lang_ajax( $taxonomy, $post_action ) {
		if ( isset( $_POST['_ajax_nonce'] ) && filter_var( $_POST['_ajax_nonce'] ) !== false
		     && $post_action === 'add-' . $taxonomy
		) {
			$referrer = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : '';
			parse_str( (string) wpml_parse_url( $referrer, PHP_URL_QUERY ), $qvars );
			$term_lang = ! empty( $qvars['post'] ) && $this->sitepress->is_translated_post_type(
				get_post_type( $qvars['post'] )
			)
				? $this->post_translations->get_element_lang_code( $qvars['post'] )
				: ( isset( $qvars['lang'] ) ? $qvars['lang'] : null );
		}

		return isset( $term_lang ) ? $term_lang : null;
	}

	private function get_saved_term_trid( $tt_id, $post_action ) {
		if ( $post_action === 'editpost' ) {
			$trid = $this->term_translations->get_element_trid( $tt_id );
		} elseif ( $post_action === 'editedtag' ) {
			$translation_of = filter_input( INPUT_POST, 'icl_translation_of', FILTER_VALIDATE_INT );
			$translation_of = $translation_of ? $translation_of : filter_input( INPUT_POST, 'icl_translation_of' );

			$trid = $translation_of === 'none' ? false
				: ( $translation_of
					? $this->term_translations->get_element_trid( $translation_of )
					: $trid = filter_input( INPUT_POST, 'icl_trid', FILTER_SANITIZE_NUMBER_INT )
				);
		} else {
			$trid = filter_input( INPUT_POST, 'icl_trid', FILTER_SANITIZE_NUMBER_INT );
			$trid = $trid
				? $trid
				: $this->term_translations->get_element_trid(
					filter_input( INPUT_POST, 'icl_translation_of', FILTER_VALIDATE_INT )
				);
			$trid = $trid ? $trid : $this->term_translations->get_element_trid( $tt_id );
		}

		return $trid;
	}

	/**
	 * @param int    $term_taxonomy_id
	 * @param string $taxonomy
	 * @param array  $translations
	 */
	private function delete_translations( $term_taxonomy_id, $taxonomy, array $translations ) {
		$has_filter = remove_filter( 'get_term', array( $this->sitepress, 'get_term_adjust_id' ), 1 );
		foreach ( $translations as $translation ) {
			if ( (int) $translation->element_id !== (int) $term_taxonomy_id ) {
				wp_delete_term( $translation->term_id, $taxonomy );
			}
		}
		if ( $has_filter ) {
			add_filter( 'get_term', array( $this->sitepress, 'get_term_adjust_id' ), 1, 1 );
		}
	}
}