I very nearly resisted the urge to point out that "couldn't resist" is a fragment and not a full sentence. ;p
I strongly disagree with Chinese being forced upon Vietnam as a language. The same, in my opinion, goes for any language that is forced upon a nation in place of their native language. I also dislike created languages - nothing can become better than a language that has evolved over millenia. I have a friend who is trying to learn Esperanto, despite me pointing out that created languages, despite being simpler etc., lack all the depth of a 'true' language, and she probably wouldn't be able to get across what she wanted to say while using the language, as a literal translation would be somewhere between difficult and impossible. In saying that, though, most languages don't translate literally into others; sentence structures and lingual rhythm is just too different.
You see now what I experience with my school being a specialised Language College? :p
And yeah, most of the articles have various sources, although some have very few and are not reliable, and nearly all simply use Wikipedia as reference.