useQuery: non-primary keys?

[jackmellis]

Not sure the best way to explain this problem. Imagine this example:

const { data: language } = useQuery('language', fetchLanguage);
const { data: messages } = ([ 'messages', language ], fetchMessages);

When my language changes I want to refetch messages. However, right now that will create a brand new query as the key has changed, so the status reverts to loading, the data becomes null etc. etc.

I want to be able to pass a key that, when it changes, causes the query to invalidate, but doesn't create a brand new query.

Is this possible? Have I done something wrong? Perhaps I've missed something in the api docs...