The language with the language code qqq is "message document"
Steps to Reproduce:
Message documentation Wikipedia
"qqq" Wikipedia (unknown language code)
Update June 21, 2021:
- Name is correct, but maybe incubator shouldn't allow it.
- Similarly: https://incubator.wikimedia.org/wiki/Wp/en-gb?uselang=en&
- Separate ticket for qqx: T285201