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How to translate Booking Calendar plugin

https://wordpress.org/plugins/booking/

To translate the labels of the form fields, you need to enter the Field Labels like this:

Booking > Settings > Form

Example:

First Name[lang=nl_NL]Voornaam[lang=it_IT]Nome di battesimo[lang=fr_FR]Prénom
Last Name[lang=nl_NL]Achternaam[lang=it_IT]Cognome[lang=fr_FR]Nom de famille
etc.

If the Booking Calendar refuses to load on your translated pages, then check this setting in Booking Calendar:

> Booking > Settings > General > Calendar > Show advanced settings of JavaScript loading

If you have set "Load JS and CSS files only on specific pages" then you need to add the specific translated pages in the fields. Or alternatively you can uncheck this option.