Create terms translations WPML

functions.php

add_action( 'wp', function () {
	if ( ! isset( $_GET['test-add-product-categories-fr'] ) ) {
		return;
	}

	$categories = [
		'Climatiseur'               => [
			'args' => [
				'parent' => 0,
			],
			'en'   => 411,
		],
		'Cave'                      => [
			'args' => [
				'parent' => 0,
			],
			'en'   => 414,
		],
		'Fours'                     => [
			'args' => [
				'parent' => 0,
			],
			'en'   => 412,
		],
		'Géothermie'                => [
			'args' => [
				'parent' => 0,
			],
			'en'   => 413,
		],
		'Pompe à chaleur'           => [
			'args' => [
				'parent' => 0,
			],
			'en'   => 410,
		],
		'Déshumidification piscine' => [
			'args' => [
				'parent' => 0,
			],
			'en'   => 416,
		],
		'Plancher radiant'          => [
			'args' => [
				'parent' => 0,
			],
			'en'   => 415,
		],
		"Échangeurs d'air"          => [
			'args' => [
				'parent' => 0,
			],
			'en'   => 143,
		],
		'Humidificateurs'           => [
			'args' => [
				'parent' => 0,
			],
			'en'   => 144,
		],
	];
	$categories = [
		'Central' => [
			'args' => [
				'parent' => 426,
			],
			'en'   => 419,
		],
		'Mural'   => [
			'args' => [
				'parent' => 426,
			],
			'en'   => 418,
		],

		'Électrique' => [
			'args' => [
				'parent' => 428,
			],
			'en'   => 417,
		],
		'Gaz'      => [
			'args' => [
				'parent' => 428,
			],
			'en'   => 420,
		],
	];

	$language = 'fr';
	$switcher = new \Plugins\Thermolux\Services\Multilingual\WPML_Language_Switcher();
	$switcher->switch_to( $language );

	global $sitepress;

	$taxonomy = 'product_cat';
	foreach ( $categories as $name => $settings ) {
		$term_data = wp_insert_term( $name, $taxonomy, $settings['args'] );

		$fr_term_id = $term_data['term_id'];

		$sitepress_taxonomy = sprintf( 'tax_%s', $taxonomy );

		$en_term_id     = $settings['en'];
		$translation_id = $sitepress->get_element_trid( $en_term_id, $sitepress_taxonomy );
		$sitepress->set_element_language_details(
			$fr_term_id,
			$sitepress_taxonomy,
			$translation_id,
			$language,
			$sitepress->get_default_language()
		);
	}

	exit;
} );