Just a couple of words about the above. Mic and Susie (not Pat) Darling, learned the song from a book. Neither of them are Gypsies. My wife and I have nothing to do with them, and that's all I need to say.
Returning to the thread, the Romany verse above has a few mistakes. It should be
Kaka (Stop talking) Chavvie (Child) dik akai (look here)
Dadrus (Father) is trying to sell a mush (man) a Kushti Grai (good horse). I am not convinced that this verse has any great age to it.
This is a sort of pigeon Romany with a mixture of English and Romanus, it is spoken this way, but not by the old families (that I tend to mix with) who speak the language correctly.
The Song is an old Music Hall song, and Tom Walsh researched it, and recorded it on one of the late Gordon Boswell's CD's together with 'The decent Vanner' which you may have heard me sing.
My wife remembers the song being sung as a courting ritual when she was a young girl. The girls would gently dance round the camp fire and a young man would ask to join her in the dance, then they would swap partners until the young folk had paired off. The Romany Rai would be sung either just the chorus, or maybe with a few verses.
Unlike the above which as Tradsinger suggests has been partially re-written, Mally remembers the chorus as-
I'm a Romany Rai a true Didikai
My home is a castle beneath the blue sky,
I don't pay no rent, 'cos I live in a tent,
and that's why they call me a Romany Rai.

The song contains a hidden Joke, in the first line. You cannot be a Romany and a Didikai. A Didikai is a half blood Gypsy. This makes me wonder if the song was always pro-Gypsy. It's a bit like saying I'm English, but half German.
The words above are a mixture of some original lines, and some modern interventions that seem to be taken from other sources, the allusion to playing the Bosh (fiddle) the reference to 'Gavvers' (Police) and especially being born in a ditch, which is one big insult. I would suggest that this version of the song was produced to portray the singer and something he is not; i.e. a Romany Rai, a Gypsy Gentleman, and IMHO the song should be treated on it's own merits if you feel there are any, and not necessarily as a part of Gypsy culture.