Amazon requires the listings and customer support (delivery and product related) be provided in the native language of the marketplace country, but you need not to worry, many sellers handle language requirements through a mix of Amazon’s translation support tools and/or external 3rd party translation service providers.
If you are an existing Amazon seller then, Amazon simplifies managing your listings with Build International Listings (BIL):
The BIL tool helps you in listing your products across all marketplaces by adding offers and synchronizing prices. It also translates the content in international languages such as German, Japanese, French, etc. BIL enables you to add numerous offers to additional marketplaces quickly.
If you are yet to selling on Amazon, then you can use Service Provider Network for listing and translation requirements.