1. First day of week. Now it is Sunday and you can't change it for Monday.
2. Names of days and months. Several textboxes to translate them.
Both features are currently supported. The first day of the week can be specified in the CSS styles (you can find details at the product's FAQ). The calendar currently includes translation to the the following languages: English, Spanish, French, German, Italian, Portuguese and Japanese. If you need a different language please contact our support service. Thanks!