Another oddity of Southern US English is their use of "ain't it" - now, in French, no matter what the verb or tense or person, at the end you can add n'est-ce pas. In English, normally your tag has to agree with your sentence in verb, tense and person, e.g.:
He went to school, didn't he? versus Il est alle a l'ecole, n'est-ce pas?
She goes away, doesn't she? versus Elle part, n'est-ce pas?
and so on.
But in the South they tend to use Ain't it as a tag on any sentence, as in He went to school, ain't it? or She goes away, ain't it?

Do the british have anything like that in any of their dialects? What do the cockney say, for instance?