Return the set of language codes for which a translated brief is present in runDir. Useful for telemetry and for the metadataFallback accounting that records which locales fall back to English.
runDir
metadataFallback
Absolute run directory
Ordered list of language codes to probe
Subset of languages for which at least one localized brief candidate file exists
Return the set of language codes for which a translated brief is present in
runDir. Useful for telemetry and for themetadataFallbackaccounting that records which locales fall back to English.