Straightforward reason: English is now the true globally significant language. Another point, English is the most prestigious language in most parts of the wor

Straightforward reason: English is now the true globally significant language. Another point, English is the most prestigious language in most parts of the world. In Asia, where I am from, English has already become or is fast becoming the most prestigious language. So, you gain lots of more respect, larger audience and more consequent benefits if you write in English rather than in any other language. It may be bad for many other languages but that's one of the facts.