diff --git a/gitnexus/src/core/wiki/generator.ts b/gitnexus/src/core/wiki/generator.ts
index fce7ce0c5..7bb8049c2 100644
--- a/gitnexus/src/core/wiki/generator.ts
+++ b/gitnexus/src/core/wiki/generator.ts
@@ -768,6 +768,7 @@ export class WikiGenerator {
         ...existingMeta,
         fromCommit: currentCommit,
         generatedAt: new Date().toISOString(),
+        lang: this.effectiveLang(),
       });
       return { pagesGenerated: 0, mode: 'incremental', failedModules: [] };
     }