Currently the Text type is used wildly in schema.org for basically two different purposes: text that is understood by human beings and identifiers that have a textual form. This makes makes the documentation more complicated, as the type of many fields is not self explanatory, and also mashes together two types which are basically distinct (see #4545)

I would suggest we add sub-types for the following text types:

• Country codes used in returnPolicyCountry, addressCountry , applicableCountry, countriesNotSupported, countriesSupported, countryOfAssembly, countryOfLastProcessing
• Currency codes, used in costCurrency, currency discountCurrency, priceCurrency, salaryCurrency
• Language codes, used inLanguage, knowsLanguage, subtitleLanguage, availableLanguage

As these types would inherit from Text, this would mean no functional change, just more clarity in the documentation.