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Problem:
The client is experiencing an error with the [esi wpml_language_selector_widget] in the Bricks editor for the secondary language, and issues with currency not updating correctly in the cart when using ESI blocks.
Solution:
For the Bricks editor issue, we recommend wrapping the shortcode in a conditional to differentiate between the Bricks editor and the frontend. Use the following code:

if ( ! is_admin() && ! defined( 'BRICKS_IS_EDITOR' ) ) {
    echo do_shortcode('[esi wpml_language_selector_widget]');
} else {
    echo do_shortcode('[wpml_language_selector_widget]');
}

For the cart issue, avoid using ESI for the currency switcher on the cart page. Instead, use this hook in your functions.php:

add_action( 'woocommerce_before_main_content', 'custom_wpml_currency_switcher_esi', 20 );
 
function custom_wpml_currency_switcher_esi() {
    if ( ! is_cart() && ! is_checkout() ) {
        echo do_shortcode( '[esi wpml_currency_switcher_widget]' );
    } else {
        // Optional fallback or nothing
        // echo do_shortcode( '[wpml_currency_switcher_widget]' );
    }
}

Remember, WPML does not control how LiteSpeed parses or caches ESI blocks, and issues might arise if ESI is not enabled correctly or if the theme or builder does not support ESI context.

If these solutions do not resolve your issues or seem outdated, please check related known issues, verify the version of the permanent fix, and confirm that you have installed the latest versions of themes and plugins. We highly recommend opening a new support ticket if problems persist.