In so far as the empire spread the English language. Otherwise, I am not so sure. I have never heard in a negotiation that a party wanted English venue with ref

In so far as the empire spread the English language. Otherwise, I am not so sure. I have never heard in a negotiation that a party wanted English venue with reference to the British Empire, respect of English courts or similar. It's simply more convenient due to the language. Usually it's a matter of negotiation. In a contract between a French and a German company, the French lawyer will suggest French law and venue, the German lawyer will suggest German law and venue. If either of them have sufficient bargaining power, it may very well prevail. Among equal parties, a compromise would usually involve selecting a "neutral" legal system and venue. English is the language everyone knows, so usually English is chosen. It's not always UK. Sometimes it Hong Kong or Singapore (typically if a party is Asian). Sometimes it's New York. Generally, European lawyers are wary of American courts and American law with its exotic remedies such as punitive damages. Also, between Europeans it seems unnecessary to go to another continent for arbitration.