Simplify the following text for a Grade 8 native English-speaking person.
Original: The Dauphin of France â '' strictly , The Dauphin of Viennois ( Dauphin de Viennois ) â '' was the title given to the heir apparent to the throne of France from 1350 to 1791 , and from 1824 to 1830 .
Simplified: The Dauphin was the heir apparent to the throne of France from 1350 -- 1791 , and from 1824 -- 1830 .