Japanese "teakhe"

Japanese client of mine was being updated about the system specifications and he was nodding his head too often which is own style. he was also saying "teakhe, teakhe" with neat pause. for few minutes we didn't understand what he meant and asked him the same. he did surprise us with a mysterious smile and told "it's your hindi...'teakhe'" . the meeting got over and it took few minutes for us to realise that what he meant was "Theakh hai" which in hindi meant OK. Apart from the fact that we laughed non-stop,i swear that i dont know how to say "theakh hai" in japanese.