Querying Translations in Conditional Properties

[Snugug]

Is your feature request related to a problem? Please describe.
With v1, I could determine if a language was the base language or not in a ConditionalPropertyCallback using properties directly on the document. Now, I need to query against the translations metadata, but there's no query context available in that callback. This prevents me from determining if a document is the base language

Describe the solution you'd like
I'd like a way to query if a language is the base translation from a conditional callback