The unspoken rule: is English really the key to success in Europe’s boardrooms?

Around the boardroom table, Carmen-Maja Rex’s colleagues slip easily between French and English. When the Airbus CHRO takes her seat, the discussion naturally settles into English without anyone flagging the switch. For a company founded in France, built partly in Germany, assembling aircraft across Europe and flying them globally, English has quietly become the default working language. The same takes place just a few hundred kilometers away at Sodexo’s headquarters just outside of Paris. CHRO Heather Jacobs is American...