What are the languages supported for hotel descriptions in Hotel-X Buyers API?

Hotel-X supports all languages, but receiving one or another will depend on what languages the Seller you connected supports

We recommend that you confirm this information with the Seller directly prior to activating the connection. 

You can also check the all the languages supported by the Seller through our Metadata query. But note that the information displayed is general and might be subject to changes depending on the agreement you have with the Seller.