It will definitely going to be spread to other countries of the world, because El Salvador country was the first country to make BTC legal tender before other countries began to make it legal tender to enjoy the benefits of BTC. With this new teaching technology they have initiated to their country to educate their citizens about BTC and other cryptocurrencies, it will help many people in the El Salvador country to benefit from BTC and other cryptocurrencies.
If this new system of educating their citizens with BTC work in the country, I guess it will going to spread like the way BTC legal tender is spreading all over the world today.
Just a reminder that Bitcoin isn't a legal tender in El Salvador anymore, not only because of pressure from IMF, but because businesses are legally required accept it, and many merchants were against adopting it because of the volatility and technical issues. Not to speak of the fact BTC being a legal tender was unpopular among the majority of Salvadorans.
Imho it's better to stay as a legal payment method for anyone accepting it, then to require all the small businesses to adopt it as a legal tender.