Facebbok api: how to get a username in a particular case (e.g. accusative, genetic, etc.)?

In many human languages, grammar requires the use of cases such as genetic, accusative motivation, etc. Facebook itself is capable of reducing (human) names. For example, if the main language is Russian, it displays “made friends with” where the instrumental case (form) is located. Is it possible to get a username in a specific case using the facebook API?

EDIT: At least you can get the username in another language by adding, for example? locale = ru_RU in the API schedule request.