Custom script to import CSV file containing terms into a WordPress site using Polylang as multilingual plugin.

import-terms-taxonomy-polylang-wordpress.php

<?php

require_once('wp/wp-load.php');

// Set the path to the CSV file
$file_path = 'brands.csv';

// Open the CSV file
if (($handle = fopen($file_path, 'r')) !== FALSE) {
	// Loop through each row in the CSV file
	while (($data = fgetcsv($handle, NULL, ';')) !== FALSE) {
		// Create the term object
		$term = wp_insert_term(
			$data[1],
			'brand'
		);

		pll_set_term_language($term['term_id'], 'fr');

		if (! is_wp_error($term)) {
			add_term_meta($term['term_id'], 'wpc_brand_id', $data[0], true);
			add_term_meta($term['term_id'], 'wpc_brand_desc', $data[4], true);
		}

		$term_en = wp_insert_term(
			$data[1],
			'brand',
			['slug' => $data[1] . '-en']
		);

		pll_set_term_language($term_en['term_id'], 'en');

		if (!is_wp_error($term_en)) {
			add_term_meta($term_en['term_id'], 'wpc_brand_id', $data[0], true);
			add_term_meta($term_en['term_id'], 'wpc_brand_desc', $data[5], true);
		}

		$array = [
			'fr' => $term['term_id'],
			'en' => $term_en['term_id']
		];
		pll_save_term_translations( $array );
	}

	fclose($handle);
}