WPML translate

Are you talking about plugin translation or calendar translation?

The calendar https://www.locandapalazzone.it/suites/suite-cardinale/

To translate this calendar, is different from translation of a plugin. You need to translate it separately as .js file. If you need so i can refer you to the files set for this purpose.

Please check these links

https://makitweb.com/how-to-change-language-of-jquery-ui-datepicker/
https://github.com/jquery/jquery-ui/tree/master/ui/i18n

Although i am providing all these files in PRO version but still your requirements is different regarding WPML, so i can’t ask you to go for the upgrade.

If I don’t set the language in plugin options I have the datepicker in the right language without translate anything.

Thanks

Then? I couldn’t understand the query i think.

In fact, yes. Because default values will work for the basic setup.