PS- Self-moderated thread to prevent spam.
As you already know, stable coins are basically based on reserving real money. At least that's what it should be. This way 1 stable coin = 1 $ (or a different coin). But not every stable coin works this way.
For example, DAI is a stable coin, but DAI is not equal to $ 1 by any mechanism. The market itself is expected to stabilize.
This way, I don't think there is a need to issue 1 stable coin for each currency. Each country will find its value against the USD in its own dynamics. However, if desired, 1 token can be generated for each currency. At Waves, there was a work in this direction for a while.