Sociolinguistics 6, Exercise 3: diglossia

The challenge: Ferguson's model expects strictly separate domains for H and L.
The source says speakers often mix varieties, especially in the Arab world,
which challenges that model.

A change of prestige: Dimotiki became Greece's sole standard language in 1976.
(The page also says Creole is now recognised as a standard language in Haiti,
but gives no year for that.)

Source: Wikipedia, Diglossia.