Monika wrote:If we call "Old Low German" the variety that Old High German developed out of, then you're right. But that's not what "Old Low German" usually refers to - Old Low German is the term for the variety that is first attested around the same time as Old High German AIUI.
But the Old Low German, the language spoken in Northern Germany and the Netherlands at the same time as Southern Germany, Austria, German-Switzerland was doing the above-mentioned sound shift / having completed it, is exactly identical to what was spoken in said area (Southern Germany etc.) before that sound shift. So why call it something different? Or if it's called something different - what is it called?
Well I don't know much about this, but the book I'm consulting says that Old High German is attested in runic texts from 500 AD. And it seems that Old Low German is attested from c800 AD. So the ancestor of both OHG and OLG would have been spoken over 1500 years ago, and would be called West Germanic or Proto-Germanic, depending on which theory you subscribe to. It's possible that Anglo-Frisian and Low German form their own branch, called Ingvaeonic.
I'm skeptical that the Old Low German spoken before the second sound shift, that is about 1800 years ago, is "exactly identical" to the Old Low German spoken after the sound shift, about 200 years later (assuming these dates are accurate). Yes, it was still the same language, so it might make sense to call it "Old Low German", the same way you can call Anglo-Frisian "English". But on the other hand, these terms are useful for labeling languages as they're spoken at particular points in time, and as far as I can tell, the term "Old Low German" is used for the variety attested from c800 to c1100.
Monika wrote:What's AIUI?
as I understand it.
