I think I confused two different languages in our above discussion about Frisian:
There are three different Frisian languages - west-Frisian, spoken by about 430.000 people in the north-east of the Netherlands, as well as east-Frisian and north-Frisian, spoken in a handful of places on the German north sea coast and in Southern Schleswig on the Jutland peninsula.
The latter two are nearly extinct, and have been largely replaced by standard (high) German and local low German dialects.
What I thought of as (east) Frisiam is in fact
East Frisian low Saxon, a low-German dialect (According to the respective German wiki, it seems the misnomer is quite widespread amongst non-Frisian Germans).
I knew that the German Frisians regard themselves as an ethnic minority, but our constitutional court rejected their request for official recognition
Low German is indeed ... well
German, it can be difficult to understand, but it doesn't feel like a foreign language. Genuine Frisian otoh is definitely a language apart, albeit a related one.
Low German dialects - what we call 'platt' or 'plattdütsch' (lit. 'flat German' ) - are spoken in virtually all of northern Germany,, even my own hometown has its own 'platt'. Or rather
had :The last people I heard speaking it were my maternal grandparents. So it's no mystery that the Frisian variants of low German would feel familiar to me, since they are related to the low German dialect of my childhood (Sadly, I've lost all but a few words)
North Frisian sounds like this:
and here's a bit of east-Frisian low Saxon:
I'd still say that the German Frisian variants sound more German to me than English - if anything, it feels more like Germandutchsomething - , but that might be due to the speakers shifting back and forth between high German and Frisian pronunciation. And yes, this is definitely a language apart, albeit, sadly, one that appears to be destined to fall victim to the very strong pressures to speak high German. I guess that's probably due to policies pursued during the unification process of the last 150 years (Germany, as a nation, is really quite young, and its constituent parts needed quite a bit of convincing to
feel German rather than Bavarian, Rhenish, Prussian etc. - that was the original meaning of the (in)famous 'Deutschland, Deutschland über alles': It wasn't at all unthinkable for 18th Century Germans to side with foreign powers in wars against their own brethren)
Sorry, my bad