Undefined $locale variable Version 3.8.1

There seems to be a missing variable on the checkout page called $locale. In the file class/WC_Gateway_Clearpay/instalments.html.php

<div
    id="clearpay-widget-container"
    data-locale="<?php echo esc_attr($locale); ?>"
    data-amount="<?php echo esc_attr($order_total); ?>"
    data-currency="<?php echo esc_attr($currency); ?>">
</div>

Its probably not relevant but I’m using WordPress 6.4.3 and Woocommerce 8.5.2