Context: The decline of Catalan continued in the 16th and 17th centuries. The Catalan defeat in the War of Spanish Succession (1714) initiated a series of measures imposing the use of Spanish in legal documentation.

Question: What declined in the 16th and 17th centuries?
Answer: Catalan

Question: Where did Catalan experience defeat?
Answer: War of Spanish Succession

Question: When was the war of Spanish Succession?
Answer: 1714

Question: What did the war in 1714 mandate as the proper language in documentation?
Answer: Spanish

Question: Who was defeated in the War of Spanish Succession?
Answer: Catalan