diff --git a/data/langdb.yaml b/data/langdb.yaml
index 33868f7..88b2415 100644
--- a/data/langdb.yaml
+++ b/data/langdb.yaml
@@ -681,7 +681,7 @@ languages:
   xh: [Latn, [AF], isiXhosa]
   xmf: [Geor, [EU], მარგალური]
   xsy: [Latn, [AS], SaiSiyat]
-  ydd: [Hebr, [AS, EU], Eastern Yiddish]
+  ydd: [yi]
   yi: [Hebr, [ME, EU, AM], ייִדיש]
   yo: [Latn, [AF], Yorùbá]
   yrk: [Cyrl, [AS], ненэцяʼ вада]
diff --git a/data/language-data.json b/data/language-data.json
index 345cebc..1aa6b44 100644
--- a/data/language-data.json
+++ b/data/language-data.json
@@ -4431,12 +4431,7 @@
             "SaiSiyat"
         ],
         "ydd": [
-            "Hebr",
-            [
-                "AS",
-                "EU"
-            ],
-            "Eastern Yiddish"
+            "yi"
         ],
         "yi": [
             "Hebr",