language property
Language is the repository's primary implementation language as GitHub computes it ("Go", "TypeScript"), and the case is GitHub's. Empty for a site with no source half and for a repository GitHub could not classify.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? language;