Going Dutch...

One "big difference" between the Orange tree and the Watermelons field is that here in the field I'll probably learn more Dutch then on the tree.
The percentage of people from out of Netherlands is not lower then the one on the tree, but here most of them are Indians and many of them has learned to speak Dutch, so often the conversations are in Dutch...
Why?
I mean why have so many Indians learned to speak Dutch? Why here there is this wider tendency of speaking Dutch?

On the tree sometime it happened that two persons from different countries started talking in a common language for the two of them, like often an Italian ex-colleague of mine speaking in Spanish with an other Spanish colleague. But not so often a non Dutch was speaking in Dutch with a Dutch...

I don't have an answer yet, but I feel that I will learn more Dutch now than in the past 6 years!