Support for Relay Modern

I am trying to use the features from Dgraph using Relay but coming across some issues.

For example I have this query:

queryMovie {
  title@fr
  description
}

Where title and description are string @lang. However when I try to compile this using Relay it errors with Unknown directive 'fr'.

Does this mean I can only use the Dgraph with a basic GraphQL schema when using Relay? I am assuming I am going to come across this issue with doing mutations also.