I'm importing into a fresh installation of a docker-wikibase and instance from Wikidata, namely Q2 (the earth). I'm using pywikibot to copy the labels from one base to the other. The problem is that when I import the labels I get:
"The supplied language code was not recognized. "
I can import most other entities without problem.
My conclusion is that there is somehow a mismatch between the languages supported in a Wikibase and the once supported by Wikidata. Does this explanation makes sense? Does someone know how to synchronise that?