diff --git a/proto/lekko/bff/v1beta1/bff.proto b/proto/lekko/bff/v1beta1/bff.proto
index d8cf25c2..d01d142a 100644
--- a/proto/lekko/bff/v1beta1/bff.proto
+++ b/proto/lekko/bff/v1beta1/bff.proto
@@ -457,6 +457,7 @@ message GetRepositoryContentsResponse {
 message GetNativeLangRequest {
   BranchKey key = 1;
   string namespace_name = 2;
+  // full language name, lowercase: go, typescript, python, etc.
   string language = 3;
 }