There is another thread that at the time showed the 2019 initiative, which shows that it is a slow process, so slow that it is still in the process of being approved.
"The bill must still be reviewed by the country’s legislative assembly. Their approval would likely make El Salvador the first nation to adopt a bitcoin standard. Its full text was not immediately available, and it is not yet clear what being the first bitcoin country will mean for the fiscally unstable and oppressively poor central American nation, where 70% of residents lack a banking account".
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El Salvador is ironically one of the countries where its citizens do not have access to a bank account, but a cell phone and Internet connection have a higher percentage.