English should be the language of business in all international companies

In Global Business Speaks English, an article from the Harvard Business Review, Tsedal Neeley argues that all internationally active companies should adopt English as their only official language of business „no matter where companies are headquartered.“ It is an interesting read for anyone who works for a company that has implemented English as one of the company languages (or for anyone who wishes their company hadn’t!)

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What do you think? Should large international companies use English as their only language of business? Why / Why not? How would you feel if your company announced all business was to be conducted in English from now (see the diagram below)? Let us know in the comments below.
https://hbr.org/2012/05/global-business-speaks-english