I want to know the answer to the following question:
What radical political changes occurred during the 19th century ?
All the background I'm provided with is that "Because of the movements of Philhellenism and the Diafotismos in the 19th century, which emphasized the modern Greeks' ancient heritage, these foreign influences were excluded from official use via the creation of Katharevousa, a somewhat artificial form of Greek purged of all foreign influence and words, as the official language of the Greek state.". Is that enough to answer the question?
Answer: yes