Right now, the wikibase:language function has the following pattern:
```
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],mul,en" . }
```
This would use the browser language, and if not set or given, try 'mul', and then 'en'.
Someimes, e.g. in Scholia, we have items with only a label in a smaller language, related to the page in a smaller Wikipedia. One solution is to list all supported Wikipedia (or Wikidata) languages, but maybe that can be wrapped into something like `[ANY_LANGUAGE]`, so that SPARQL queries can do instead:
```
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],mul,en,[ANY_LANGUAGE]" . }
```
The expected behavior can be discussed when there are multiple languages that it can select from, but I'd be happy with the `sample()` solutions here, to just give some hit.
For some context, see https://github.com/WDscholia/scholia/pull/2310#discussion_r1806800969