Not quite a typo but along similar lines... when I first arrived in London, I saw many a postcard stuck on phone boxes and such like advertising 'French lessons', and some 'German lessons', too. Looking for work and having qualified as a technical translator I thought that was a jolly good idea, I could give private tuition! So, I stuck a card up, too, with the phone number of my then landlady, who was none too pleased when she got some very strange phone calls asking for not exactly German lessons. I was told, possibly by Pete, I can't quite remember who it was, that I should have advertised 'German tuition'... it took me an age to understand.. 😳