How can get the related pdf documents for multi languages si

I add versions to a document by language.

I added versions to a document by language, i need consult all the versions (per language) for these document.

This is my code but i don't know how consult the related documents.

public void GetDocumentLanguageVersions(IEnumerable<Guid> documentsId)
{

   var librariesManager = LibrariesManager.GetManager();

   var documents = librariesManager.GetDocuments().Where(document =>documentsId.Contains(document.Id));

   Document sample = documents.FirstOrDefault();

   string[] languages = sample.AvailableLanguages;

   var languageData = sample.LanguageData;   //this property says me exist 2 versions (language) for this file but i don't see the ids for those files  
   
}