Not true. The period of greatest scientific advancement in human history ( mid-19th to the mid-20th century ) had no lingua franca. Actually, the end of french as a 'lingua franca' in europe in the first half of 1800s can partly be credited with the burgeoning of science ( and other academic fields ) in britain, germany, russia, etc. Just like the ending of latin as 'lingua franca' ( beginning of the 'vulgar' period ) led to the burgeoning of religion, philosophy, literature, etc throughout europe.
> Maybe we can lower the standard a little bit? I don't mean broken Engrish but if the sentences make sense and the grammar is correct, maybe that is good enough?
Or maybe people should speak their own language and 'do science' in their own language.
What's more preferable? Having one billion chinese learn english to study algebra with an english language textbook or translated that one algebra textbook into chinese and have one billion chinese learn algebra in chinese?
The dull and boring mono-linguistic and mono-culture world has led to stagnation. The world would be infinitely better off when that changes. When we have actual diversity, not the superficial diversity where we look different but all think and talk the same.
Look at the tech world today. Look at just europe alone. How great would it be if europe had a german, spanish, russian, french 'google/apple/microsoft/etc'? Now broaden that view to the arab, persian, chinese, indian, african, etc regions. So much diversity, knowledge, creativity, etc is lost because one group of people want to dominate the world. It's tragic.