3 ms·You and the parent poster spell caffeine as coffein. Is that an alternative spelling, or was it a joke?by copperx 7y agoYou and the parent poster spell caffeine as coffein. Is that an alternative spelling, or was it a joke?guzey 7y agooops, I just mirrored the OP's spelling without thinking.Tomte 7y agoIt's the German word (well, Koffein, really). I do know the English word, but every now and then something gets through.