IB world literature paper 2 option B ?

I want to do Option 2b and turn the first few poems of an anthology into the opening of a novel and I wondered.. how far can you stray from the original thing... for example I thought about making the narrator who is a peasant from Latin America in the 19th century, a 21st century working class person in England because that's what the character reminded me of and making it sort of edgy (which may involve some swearing and slang and graphic imagery) ... would that be at all allowed as long as i justified it in my statement of intent or is it a risk??