This is one of those measures that hyperinflation countries have to adopt for sanity, re-numbering the money.
The surprising case that worked is the Brazilian "Real": by renaming the currency as well as switching it to semi-controlled exchange rates, inflation was drastically reduced. https://en.wikipedia.org/wiki/Plano_Real
> Combined with all previous currency changes in the country's history, this reform made the new real equal to 2.75 × 1018 (2.75 quintillion) of Brazil's original réis.
(!)
Renaming didnt drastically reduce inflation. If it were that easy everybody would do it. It just allowed the government to reduce inflationary expectations while they did the legwork of throttling spending, etc.
If they hadnt done the legwork to reduce inflationary pressures this parlor trick would not have worked.
And, arguably, if they hadnt done it at all, inflation would still have gone down simply by reducing the inflationary pressures.