I select the language on tour or activity service but the language of the website doesn’t change anything.

To clarify, selecting a language for a tour or activity service on your website does not necessarily change the language of the entire website. It is used to categorize tour guides who can speak the language on the trip. If you want to translate your entire website, you can use the WPML plugin.

To create an option for language on tour or activity services, you can navigate to Theme Settings > Attributes and add a new attribute. From there, you can create a category for language and assign it to your tours or activity services. This will allow visitors to filter by language when searching for tours or activities on your website.