What language do more people speak as a mother Lang tongue then any other handy English and Mandarin or Chinese?

The language spoken by more people as a first language than any other is Mandarin Chinese.

While English is spoken by a large number of people globally, it's primarily a second language for many. Mandarin Chinese, on the other hand, is the native language of over 900 million people, significantly more than the estimated 375 million native English speakers.