While the statistics are updated, the definition of "extreme poverty" just fails to keep up.
The moment people have food, they want lots of food, then they want delicious food, then they want more exclusive food, and so on.
There'd be no problem if the supply of food (resources) can keep up with human's greed, which never happens.
Delving in the specifics of individual human languages would be a colossal waste of productive time to otherwise pursue "harder" science and technology.
The only possible "language universal" will be machine language when humans merge with machines.
The physical makeup of the biological brain which is subject to random biochemical reactions just can't maintain something as consistent as how a "language universal" should be.