While your correction is important, the whole idea of Mandarin being one language is also a bit messed up. The different Spanish speakers of the world will have a much easier time getting together and understanding each other than the various groups of Mandarin speakers.

Where one language ends and another begins is largely political, which makes it difficult to make a fair count.

Where else is Spanish a "native" language other than Spain? It's spoken across South America and some of Asia, but that's due to colonialism the same as how English spread. The natives of South America didn't speak Spanish before they turned up.

That is definitely not true.