Peter T. Daniels wrote:

>
> "Written English" and "writing system" are not at all the same thing.

Correct - it is the relationship between "written language", "writing
system for that language" and "spoken language" that I was asking about
originally. What is the nature of that relationship? How do changes n
one affect or influence (directly or indirectly) the others?

If this is not your area of expertise, I respect that. It is perfectly
OK to be interested in only specialized areas without grasping the
broader questions someone might pose about the relationships between
specialized areas. No need to insult people for exploring relationships
you have no or limited interest in.

Best,

Barry