I recently became aware of the product featured above. The thing that struck me as odd (as I believe it would most Americans) is the unusual spelling of what we know as yogurt. I suspected it was a Britishism because of Alan Rickman. To be more precise, there’s a scene in the movie “Love, Actually” in which Rickman is trying to buy some jewelry for a woman not his wife, and the sales clerk (played by Rowan Atkinson) won’t let him just get on with it. Rickman finally says in exasperation: “Dip it in yogurt, cover it with chocolate buttons!” He pronounces yogurt with a short o in the first syllable–that is, to rhyme with hog–and that’s consistent with the yoghurt spelling.
(If you want to hear Rickman say this line, check out this hilarious YouTube mashup:
According to the OED, up until the mid-twentieth century, various spellings for the word (derived from Turkish) abounded, including yoghurd, yogourt,yahourt, yaghourt, yogurd, yoghourt, yooghort, and yughard. Subsequently, according to this Google Ngram chart, yogurt (red line) has prevailed in the U.S., and has roughly tied in the U.K. with yoghurt (yellow and green lines).
Google Ngrams only goes up till 2008, and when more recent data come in, I’m sure that as a result of companies like the Minnesota-based Mountain High, U.S. yoghurt (blue line) will be on the upswing.