If you did not know how install and configure WP Datepicker yet, then follow the guide link below first then follow these steps to use WP Datepicker in other languages.
- Login to the WordPress admin panel go to settings click on WP Datepicker as shown in the figure below:
- At WP Datepicker setting page, there is an drop-down option select language as shown in the figure below:
By default language is English. But you can select other languages. 74 languages are compatible in it.