was that October last year I toured Cuba for a few weeks. The other tourists included an Indian lady and a guy from Sri Lanka too. The lady seemed to suffix everything with isn't it. I asked the guy, who was as English as me anyway , why she did so and he laughed saying "your used to it as innit - she's using the full expression "isn't it" because she's well spoken.
In actual fact she was as English as me too. Funny old world - innit.
I've never used that expression myself but I'm the world's worst for saying whatever.