In American English we have "OK" or "Okay". I have noticed that Orientals can often put a lot more life into the word than we do. For us it is just an acknowledgement, but they can make it into a very positive, energetic, or enthusiastic statement.
Well, I realice what you mean, but I cannot think a word now(I speak Spanish from Spain). What I have always notice, as I speak three lenguages: Englis, Spanish and French is that some feelings are, in my opinion, better put into words in one lenguage than another, that's the reason why I think to learn other lenguages is so important, not only opens doors to the entire world, it also opens your mind and changes your thinking.