LONDON — There’s a helpful sign on the backs of seats in the family section at White Hart Lane, home of Tottenham Hotspur.

“Mind your language,” it begins.

“The north stand is our family stand,” it continues, with the second part of the sentence boldfaced. “Therefore, our club would like to remind supporters to show consideration for the large number of children and families that occupy this area.”

Then, more boldface.

“Please refrain from using foul and abusive language or behavior of a threatening nature.”

When my younger son, Eli, pointed out this stern, bright yellow notice to me, he had a huge grin on his face. He had just turned 10, was earning an allowance for the first time and was ready to expand his vocabulary. This was our second Spurs game since moving to London, and we knew what was coming. As far as he was concerned, White Hart Lane was a safe space where he could learn to cuss.