Not really; for both ISO 639-3 is required.
I think the reason for simply allowing any (639-3) language to be included into Wikidata, without any software localisation requirements, was that it could also be dead languages (similar to how Wikisources can be approved in dead languages without requiring interface translations).

2016-11-28 16:31 GMT+01:00 Milos Rancic <>:
On Mon, Nov 28, 2016 at 10:28 AM, Gerard Meijssen
<> wrote:
> We have done that. When a language has an ISO-639-3 it is admissible for
> Wikidata.

Do we have different rules for Wikipedia and Wikidata?

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