Language Subtag Registration Form: variant "signed"

[John Cowan]

Frank Ellermann scripsit:

> > in the first case the lexical source for the signs is British
> > SL, whereas in the second case it's Irish SL.
> 
> Yes, so far it's clear, and what practical relevance does that
> have wrt tagged content ?  Is en-IE-signed "undecodable" for a
> signer of en-GB-signed ?

Yes.  ISL is far more closely related to French SL and ASL than
to BSL.  Many of the world's sign languages are descended from
earlier versions of French SL, but BSL is not one of them.

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