Specifically, I am looking at Israeli Kif Kef bars - the ones sold in the States. Presumably they are identical to the ones from Israel. See picture. The hechture is Bedatz.
I checked a few shopping sites. It seems that for some reason, all the U.S.-based on-line shopping sites sell the Hebrew packaged bag. That one clearly says that it is Chalav Yisra'el. This site shows the Hebrew text package, says the product is Chalav Yisra'el, and says that the text on the package may be in English. I assume that ENglish text doesn't affect the Chalav Yisra'el status.
Additionally, this site sells other Elite chocolate bars. They have English packaging and the products are all Chalav Yisra'el.
Just my own deduction - I can't quite see that Elite would make all the other chocolates Chalav Yisra'el but not Kif Kef. And, as stated, it looks like the Kif Kef sold in the states is the exact one sold in Israel, as I don't see any of these sites selling an English-text bag.
Check with a rav, a store mashgiach or call Elite or even OU (seems they certify the chocolate bars) to be sure.