For exemple a simple brainwashing illustration in the west is the fact that Imperalism is synonym to weapons/war/bombs and all things related to military. While indeed the biggest treat and real imperalism is culural and linguistic.
Hollywood and affiliates are bigger treat than any US Battaillon into subverting and destroying nation.
And it's even more dangerous because im an active actor of my own subvertion, of my own languistic and cultural destruction like im forced to use English (not my native language to expose my opinion here)
If the people like a certain forms of culture more than others, well, then that's there preference and their freedom to choose. It doesn't harm anybody, and if you have something better to offer, go and tell people. Let them decide if they like it or not. That's not going to happen with tanks and bombs.
Has anybody ever died from speaking or listening to English? As ugly a language as it is, I prefer that 1,000,000 over having a grenade explode in my front porch.
For dictators.
Read and understand your brainwashing
And now I know why it's not being taught more widely, despite the obvious economic advantages this could provide. You don't want the population to be able to speak to their 'enemies' or read news from the other side easily. It's pretty obvious now the mad lunatic has been preparing the country for what's happening for about a decade, and he truly believed when he talked about the 'encirclement' and 'sending nukes to Florida'.