Someone said :
Wouldn't the formation of a USL be a more pressing issue than the recognition of ISL..?
An Esperanto-type of sign language ("Gestuno") would be an ineptie.
It would deny deaf people their cultural backgrounds, and simply be impossible.
Sign language is not a symbolic language disconnected from the national language it is developed into: it carries some of the structures and specificities of the cultures is is developed in. And its grammar is heavily impacted by that of its host culture. And this is the most dramatically evident in the concept of "mouthing", which is closely connected (but not directly or exclusively correlated) to how the host spoken language is... spoken!
Think for a second about how Japanese and English differ, and how that impacts JSL versus the various English-based sign languages.
The "International Sign Language" is a pidgin, a "Gestuno" with limited vocab or usage. It is a useful technical tool, but it would as impossible to make it "universal", ad it is impossible to define a single "Gaeilge" that would unify all canúintí: An Caighdeán Oifigiúil
itself is only a technical and administrative tool, native to no-one...