Complex sentence: The film, which is starred by Viggo Mortensen, is the most expensive Spanish-lingo film ever made in Spain (about €20 million--US $26 million), and describes the Spain of the 17th century using both fictional and real characters.
Split into simpler sentences: The film, which stars Viggo Mortensen, is the most expensive Spanish-language film ever made in Spain (about? 20 million--US $26 million). It portrays Spain of the 17th century using both fictional and real characters.