Language Wars can divide global companies. What happens when English becomes the mandated language at a global company? Troubles can follow, if the employees are not prepared. One tip is to: “Encourage practice of the new language. Provide nonthreatening environments where the new language can be studied and practiced.” Fortunately, there are books like Speak Business English Like an American and Speak Better Business English and Make More Money that can help non-native speakers become more fluent in business English!
For more on the challenges of implementing English as the language of business in a global company, read this Harvard Business School article: