I especially object to the case of zip-code being used internationally, because this isn’t a case of a sensible alternative usage, but rather one very specific

I especially object to the case of zip-code being used internationally, because this isn’t a case of a sensible alternative usage, but rather one very specific US term being interpreted as universal. Please, for internalisation sake, use the generic term ‘postal code’ in English , then regionalise as appropriate (e.g. Post Code in the UK, Eircode in Ireland, Postal Index Number in India, Zip code in the US, etc.)