@fredbrooker @stephaniewalter In my language we say pincode (it's even in the dictionary), probably for the same reason a lot of people say pin number: acronyms tend to become words themselves, losing their direct connection to the original expanded words. Sometimes it then feels more natural to have a disambiguating signifier, in this case number of code, even if it is, strictly speaking, superfluous. I consider it a form of language evolution.

@fredbrooker @jelte yeah, I think you have them in any language.
For example, "le virus du VIH" (HIV) --> "le virus du Virus de l'Immunodéficience Humaine" in French