Hi there,
Thanks for getting in touch with us.
Because the text for the categories and the InfoWindows are custom text, it is not possible to automatically translate them using WPML.
Depending on the number of categories and markers on your map, a solution would be to duplicate the map from ‘Maps’ -> ‘Duplicate’ and then use this for the Spanish version.
I am really sorry for any inconvenience and I hope this helps.
Kind regards,
Dylan