虽然英语是如何产生的对许多人来说还是个谜，但它的确已经成了国际语言。
------Though it is still a mystery to many (people) how the English language formed, it has indeed become the international language.
虽然英语是如何产生的对许多人来说还是个谜，但它的确已经成了国际语言。
------Though it is still a mystery to many (people) how the English language formed, it has indeed become the international language.