Entered wrong country when buying resale

I just got a ticket on resale and due to being in a bit of a panic and trying to complete the form in French (didn't want to risk trying to change it to English in case I lost the place) I've accidentally chosen German as either the language or country I'm from. Not sure which it was as my high school French is disgracefully bad but will it matter? Don't want to get there and have issues getting in because I have a UK passport