The property is declared on the individual but it is empty.

The instances we have currently are of type IndividualLanguage and LivingLanguage but not of NaturalLanguage, which seems wrong, and may hamper implementation.

This is an issue with the reference data we provide not with the specification document per se.

Rather a site issue than a specification one:
Links to the rdf versions of the ontologies are not usable with "owl:imports", nor may the ontologies be downloaded locally for reuse, because instead of the rdf what is downloaded from the links is the html file.

Change made by ISO 2022-03-03

Changes made by ISO 2022/03/03:
Addition of category region in eng, fra, ara, kur;
Addition of region IQ-KR;
Assign parent subdivision to IQ-AR, IQ-DA, IQ-SU;