My grandma on my "father's" side is from either India, Pakistan or Bangladesh... what is she saying?

I know.. I should know where she's from but I don't, long story. She told me before but I can't understand or remember. How the hell do I say GRANDMA?? What language should I be tryna to learn? I like my grandma but I find myself avoiding her calls cuz iono what to say. She's really old and likes to talk. She likes to tell me about life and other old Indian lady stuff.. I wanna hear it but ion understand it. LOL.. How do I say 'Big Man', hello, goodbye... and anything else you guys can think of? Thanx