diff --git a/flake.nix b/flake.nix
index 3d9db6d..f9e648d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -77,13 +77,21 @@
               }
 
               # Non-English audio:
-              # 1. English non-signs non-forced subs
-              # 2. English non-signs forced subs
-              # 3. Undefined non-signs non-forced subs
-              # 4. Undefined non-signs forced subs
-              # 5. English signs/songs subs, I guess
-              # 6. Undefined signs/songs subs, I guess
-              # 7. Forced subs in other languages, I guess
+              # 1. English non-signs non-forced subs, default subs iff default audio
+              # 2. English non-signs non-forced subs
+              # 3. English non-signs forced subs
+              # 4. Undefined non-signs non-forced subs, default subs iff default audio
+              # 5. Undefined non-signs non-forced subs
+              # 6. Undefined non-signs forced subs
+              # 7. English signs/songs subs, I guess
+              # 8. Undefined signs/songs subs, I guess
+              # 9. Forced subs in other languages, I guess
+              {
+                alang = "*";
+                slang = "eng?";
+                blacklist = [ "sign" "song" ];
+                condition = "not sub.forced and ((audio.default and sub.default) or (not audio.default and not sub.default))";
+              }
               {
                 alang = "*";
                 slang = "eng?";
@@ -95,6 +103,12 @@
                 slang = "eng?";
                 blacklist = [ "sign" "song" ];
               }
+              {
+                alang = "*";
+                slang = "und";
+                blacklist = [ "sign" "song" ];
+                condition = "not sub.forced and ((audio.default and sub.default) or (not audio.default and not sub.default))";
+              }
               {
                 alang = "*";
                 slang = "und";