I want to know the answer to the following question:
Approximately how many languages are spoken in the Greater London area?
All the background I'm provided with is that "The city's metropolitan area is one of the most populous in Europe with 13,879,757 inhabitants,[note 4] while the Greater London Authority states the population of the city-region (covering a large part of the south east) as 22.7 million.". Is that enough to answer the question?