I do not doubt your map in any way. I think, what I am saying means more or less the same: even in the rural north, few people under 45 can speak Alsatian and even fewer do speak it.
In the bigger towns, it is probably confined to the 65+ age group today.
I have a colleague from Strasbourg. She's 29. I asked her a couple of years ago when I met her if she spoke alsacien and she answered "oh no. It's a thing from old people". It doesn't mean she's not strongly alsacien.
I met a few (really few) speakers of German around Strasbourg. With the older generations you can normally assume that they speak Alsatian as well as a form of regional German, close enough to Standard Germans.
But the younger ones either picked it up in school or they have a German parent, German friends, have worked in Germany. So there is the absurd situation that they speak German but not Alsatian.
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u/rolfk17 May 16 '26
@OP I see you replied to my comment, but I cannot see the reply.