Dubbing?

I just watched the DVD, and the dialogue was in English. Yep, some characters had definitely been dubbed, but it did appear that Lily was speaking in English (not surprisingly given that she's English). The old lady was definitely dubbed (she's German). There was no option for 'original' language on the DVD, or subtitles. I'm guessing that on the French audio track that Lily would have been speaking English and they would have dubbed it into French. So there may be no such thing as the 'original' language. Note that of the four main characters, none are French. One is English, one American, one French-Canadian, and one German. I guess they would have filmed in English, German and perhaps French? then dubbed as required; there's probably no such thing as an un-dubbed version, it would make no sense at all to hear three languages being spoken. I'm curious to hear if someone can confirm/deny this.

They probably did what Sergio Leone did on his westerns and all spoke their native tongue, then dubbed everyone accordingly into whatever languages they required. "The Good, the Bad and the Ugly" lists Italian as the primary language, but nobody complains about that being dubbed, mainly because two of the main characters were Americans speaking English. So English audiences hear most of the characters dubbed from Italian into English, whereas Italians hear everyone speaking the original Italian with Eastwood and van Cleef dubbed into Italian.