you'd first need to convert your Francs into x-coin.
Francs -> USD -> x-coin
Francs -> USD -> x-coin
But maybe Zimbabwean exchanges don't follow KYC. That's great for you, but going Franc -> ZD -> x-coin exposes you to a lot of other problems.
Thats completely different from "conversion" bans that you were talking about before.
Sure, you can ban the use of all tokens, but a conversion ban between 1 currency and another makes no sense.
https://en.wikipedia.org/wiki/Foreign_exchange_controls
the Greenback<>Greyback exchange situation during the civil war was also an interesting example of this.
I think anyone doing anything in cryptocoins needs a serious lesson in monetary history and policy.