Fòram na Gàidhlig

Hallo, again. I wonder, on what speaking norm, grammar rules dialect is based standard scottish aelic?

1. how much dialects in scottish gaelic? Which one's pronounciation is taught in school books and any language courses?
How many colours are in a rainbow? It's hard to define "a dialect" as they all blur into each other.
3. is thare any kind of nasalizations in gaelic, like urú in irish?
There's ...

Hallò evryone, i'm just fresh in gaelic, so I have many questions.

Three questions:
1. how much dialects in scottish gaelic? Which one's pronounciation is taught in school books and any language courses?
2.how to say off-topic? :)
3. is thare any kind of nasalizations in gaelic, like urú in irish ...