I know Hindi fairly well, and want to learn Persian and/or Arabic.
Which of these two languages has a closer relation (if there is one at all) to Hindi?
Dear Bienvenidos, Written and spoken Arabic are also quite different Do you know Arabic? And in my opinion, it's more different. Anyway, I just wanted to say there's difference.Persian is closer. However, it's not realistic to say that someone who speaks Hindi will instantly pick up Persian; Persian (depending on the dialect) takes a long time to learn, and I would say that--speaking for the Eastern dialect--it is harder to learn than Arabic just because the Eastern dialect is spoken differently than it is written.
Best of luck.