The claim is that it is a literal translation, not that it is a loan word from German. Ie the Germans wrote their paper for this new control flow in German wenn/dann/sonst, then took their Langenscheidt and looked up "sonst".
replyI don't think the article author is concluding what you think they are.
replyThe HN title reads "literal translation," which I didn't take to mean "literally".
The linked article doesn't really have a title. The article author states [...] "I think a carefully-chosen German word was probably translated as an archaic English word and then never revisited. Unfortunately we do not have the original German text to consult."