I would prefer Bengali, since it is the most common language in the region, but I'll make do if I have to. Every translator I've found spits it out in the Bengali or Hindi alphabet, with no option to translate phonetically into English, including Babelfish (I'm desperate), or at least as far as I've been able to tell.
So far I've googled: Bengali/Bangla endearment, Hindi endearment (which netted me Lal, but I'm not sure that's right), Bengali/Bangla endearment friend, Hindi endearment friend, Bengal/Bangla endearment female friend, Hindi endearment female friend, and I've tried all of the above with phonetic english attached.