List of ISO 639-5 codes

This is a list of ISO 639-5 codes, including the code hierarchy as given in the ISO 639-5 registry.^[1] The code und (undetermined) from ISO 639-2 can be seen as top of the hierarchy (for example, und:aav, und:euq:eu). The hierarchy is not a complete genetic hierarchy; some of the collection codes are based on geography (like nai) or category (like crp) instead.