Yes I can vouch for this taboo in French culture. Once I was in a taxi in Texas with a French friend, and the Texan driver and I chatted about daily life and bonded over how cost effective something was. We used the phrase "to get your money's worth". My friend sat quietly. After we got out of the taxi he told me how shocking it was to hear Americans talk to random strangers about money. 🤣😆😂
