[andreasvc]

It's really only the vocabulary which takes from European languages, because the grammar is schematic, very regular and simple to learn. Broadly speaking, you have two options: 1) you select a specific group (e.g., European languages) and sample from their vocabulary. 2) you sample from ALL the world's languages, or generate completely random words (effectively just as hard to learn).

In the first case you have privileged one group, but in the second everyone loses ... In the second case you create an additional barrier because there is a large amount of new vocabulary that everyone has to learn, while in the other anyone who doesn't know European languages will have to learn some of its vocabulary, but that might be useful to them anyway, so it clearly seems like the better option to me.