"I know your father-in-law."
Translation:Dw i'n nabod eich tad yng-nghyfraith.
Ah - I'll have to report it then. Also in this section I was marked as 'wrong' for not putting hyphens between mother-in-law and then in the next question I left them out and was marked wrong for not putting them in. There were so many errors in this section that I gave up in the end...I'd already reported three. Very frustrating!