Enter 2 menu fields on the Magento Checkout page 2.3

In Magento 2.3 in the ckeckout page I have to add 2 new fields with drop-down menus, with the possibility to select, an example of a drop-down menu is this in the image: [login to view URL] the position of the drop-down menu on the Checkout page must be under the heading of the company. In the process chain these data entered on the Checkout page must be displayed on any payment page to understand OnePageCheckout or Magento invoice This drop-down menu should have the possibility to have the obligation or not to be selected, to go on .... Must have the possibility to be bilingual. Indicate the CSS code, if the new drop-down menu should be hidden Possibility to have the code inserted in files... Construction time 2 days Paul Thanks!