Thank you for contacting the support forum.
Before your ticket is assigned to one of my colleagues, please allow me to walk you through some initial debugging steps. This will help speed up the support process.
I checked the code, using gettext filter for changing the text is very expensive.
You should avoid it and look for a filter to change the text, if not available ask the plugin developer to add a filter or provide a way to change the text.
Anyway, for the solution, you should not pass variable in text domain
$translated = esc_html__('Similar hotel deals', $domain);
Instead use text value.
Please check the updated code
$translated = esc_html__('Similar hotel deals', 'your-theme-domain');
$tabs['additional_information']['title'] = __( 'Booking information', 'your-theme-domain' ); // Rename the additional information tab
$options[ 'menu_order' ] = __('Sort from A to Z', 'your-theme-domain'); // rename
Where "your-theme-domain" should be replaced by the actual theme domain. Generally, it is the name of the theme folder e.g. "twentytwentyone" for Twenty Twenty One theme.
Then please follow these steps:-
1. Go under "WPML -> Theme and plugins localization"
2. Scroll down to "Strings in the theme" and select the active theme then click on "Scan the theme for strings"
3. Once you followed the above steps go under "WPML -> String Translation". All strings available for translation should display in the table you see there.
Do you see them? If yes, all you need to do is click on "translations" next to each string you want to translate.
