I have watched the vaudeville actmusical 'Billy Elliot' online today.

I don't have a satisfying explanation why, but present perfect sounds a bit strange here. Vaudeville is a very specific thing, very old-fashioned, from the 1890s.

It is a wonderful show and I recommend you guys to watch it.

When I was watching it, I thought that it would be a fantastic experience if I shcould have seen it in the theater.

I have never seen any vaudeville act offmusicals in real linfe.

Assuming you mean "shows like Billy Elliot".

"offline" is clear here and people do sometimes use it like this but I'd definitely say "in real life" here.

I wishhope I will one day.

I think I figured out an explanation for this once, but I've forgotten it :( "wish" isn't very wrong, but we'd say "hope" here.

I like the danceing in the show very much.

You'd say "dance" if you were talking about a specific routine. "I liked the dance they did at the end of the second act."

I was confused by the songs, I thought they were not saying English totally whilepeaking completely in English, even though the background was in a small town ofin England.

I had to guess at the meaning here.

Maybe therey were saypeaking a kind of dialect.

Or "talking in a dialect", or "using a dialect". "say" only for a specific fragment of speech. "What did that guy want?" "He was saying 'do you know where the toilet is?' in French."

Actually, it was a show about a little boy who was talented in ballet.

Or "little kid" or just "boy".

Although ballet is beautiful and elegant, I don't like it because it looks painful, especially when the dancers stand ion their toes.

Every time I watch ballet I am wondenring whether they feel pain everytime when I watch ballet.

"I wonder" would be a little more natural, but I think continuous is okay.

I like dance, in particular the Western modmodern Western dance.

"modern" is an adjective about age, "Western" is an adjective about origin, so they have to be in this order.

Even though most of the time, I can't get what the dancers want to express, I'm always struck by the them.

It feels like free as well, even if I'm tone-deaf.

I think what I like is something natural adnd free.