Things are not as simple as "switch corporate language to English --> problems solved".
Read "Language management" by Bernard Spolsky, for interesting insights on corporate multilingualism.
The biggest capitalisations in the Japanese stock market aren't all car companies. And see the best performers of the Nikkei 225: no car companies, but Casio, Konami, TDK, Fujifilm, etc.
But does Finland have the widest waterfall in Europe?
I'm a historian so I can tell you it is expected for a French historian to know French, English, Italian, German, and maybe Spanish.
But actually, we do most things in French only, and blissfully ignore the rest of the world while circlejerking and parroting our memes, indeed.
Regarding successful people in France, such as your top lawyer, real estate developer, independent CEO... who make several millions per year, they do everything in French and usually speak English like a Neanderthal.
The reason is that the French market is big enough for them to be surrounded by French people (clients, employees, etc.) all day, so they forget all their eventual English skills. And when the odd English translation is needed, they pay people for this.
Personally, I only use English to waste my life on Sup Forums (a website I fucking hate). For all the rest, French is enough. And I'm educated, rich, etc.
JAPAN NOT STRONG ENOUGHT