"Excuse me, sir. Seeing as how the V.P. is such a V.I.P., shouldn't we keep the P.C. on the Q.T.? 'Cause if it leaks to the V.C. he could end up M.I.A., and then we'd all be put out in K.P."
It took me a couple comments before that realization though.
Source: I'm from Germany
There's even a small Twitter trend of posting "when you need English to navigate in Moscow". Se. e.g. https://demotos.ru/sites/default/files/caricatures/2019-10-3...
I believe you have that inverted.
An abbreviation is a shortened version of a word or phrase, and encompasses both initialisms and acronyms. An initialism is pronounced one letter at a time.
Acronyms are a separate special case - an abbreviation that is pronounceable as a word unto itself.
I remember feeling that in English, acronyms are barely used..