As Franck Verhaeghe and two friends planned a March trip to Mexico City, they plotted out not only where they would stay and which museums they would visit but also the language they would speak: French. “It’s not that I…

As Franck Verhaeghe and two friends planned a March trip to Mexico City, they plotted out not only where they would stay and which museums they would visit but also the language they would speak: French. “It’s not that I…