Am 10.04.2017 um 18:56 schrieb Gerard Meijssen:
Hoi, The standard for the identification of a language should suffice.
I know no standard that would be sufficient for our use case.
For instance, we not only need identifiers for German, Swiss and Austrian German. We also need identifiers for German German before and after the spelling reform of 1901, and before and ofter the spelling reform of 1996. We will also need identifiers for the "language" of mathematical notation. And for various variants of ancient languages: not just Sumerian, but Sumerian from different regions and periods.
The only system I know that gives us that flexibility is Wikidata. For interoperability, we should provide a standard language code (aka subtag). But a language code alone is not going to be sufficient to distinguish the different variants we will need.