The examples provided in 13.164.1 ValueSet: Language codes with language and optionally a region modifier. Are misleading. While the guidance above states to use a 2-character code id one exist and a 3-character code if a 2-character code does not exist, the example shows both. A value set that has only the specified values to be used should be listed. In addition, USCore and C-CDA should provide similar examples. More clarity would ensure proper use and sharing of language.