人家 has two meaning: 1.Girls say to her boyfriend :"人家想去看电影嘛。" That means "I would like to see the film." 人家 is a intimate way to say " I ". 2.The second meaning of 人家 is " He ". "人家不想吃，就别让人家吃。” This sentence means "He don't want to eat, don't force him."

I don't think they got a word/s in English for that, after all, girls have different ways to be pretentiously "cute". In different cultures. Like saying "mumy", "piggie", "catty", etc. The point is the tone.

人家 = house, household

人家 = Other people

It can be translated to he/she in the sentence you gave, if the person speaking is referring to a specific person. eg. You try to give you Dad his medicine but he doesn't want to take it. Then your mom says "人家不想吃，就别让人家吃。" So 人家 will be translated as he (your Dad) in this case. It can also be used for "other people" / "they / them" eg.不要管人家 or 人家的东西不要去动 Or "the other person" in the context of meaning "I/Myself" eg. a guy keeps trying to give a girl he likes a bouquet of flowers but the girl doesnt like him so she turns to him and says '人家已经说不要了啦！'