[lifthrasiir]

Your point is still not substantiated. There are many language pairs closer than Esperanto (I mean, there exists x and y such that `d(x,y) < max(d(x,eo), d(y,eo))`), even after the easiness due to the artificial origin is accounted for.

[akvadrako]

Of course there are languages that are so close together speakers can understand each other without even studying.

But I'm sure there is no language (with at least 1 million speakers) which is easier than Esperanto to learn for the average Asian. It isn't a European thing.