[graeme]

Strasbourg was French from 1681, then German in 1871, then French in 1918. Then only briefly German in WWII.

So it wasn't German very long, only 50 years.

As for Montreal, it will be interesting to see how the city evolves. I notice more English in my neighbourhood than when I moved in (8 years ago). But, there is also more French in the old anglo neighbourhoods of the west.

One factor is that a lot of "allophones" are perfectly fluent in both English and French. When you add in the francophone tendency to switch to English when dealing with anyone who shows even a whiff of not being a native francophone, a lot of francophone majority neighbourhoods may see English conversation.

(I'm perfectly fluent and speak French in public. But for the life of me I can't francophone friends to speak French. I think they all want to practice their English. Also, the Quebecois that care about Anglicization probably don't move to urban montreal)

[smitherfield]

“Germany” hasn’t been a country very long, only since 1871, but an identifiable German culture has existed since Roman times. German (or precursors) was spoken in Alsace for well over a millennium before declining and dying out in the 19th and 20th centuries.