diff --git a/data/langdb.yaml b/data/langdb.yaml
index 8630c0a..5629de0 100644
--- a/data/langdb.yaml
+++ b/data/langdb.yaml
@@ -261,6 +261,7 @@ languages:
   jbo: [Latn, [WW], lojban]
   jdt: [jdt-cyrl]
   jdt-cyrl: [Cyrl, [EU, AS], жугьури]
+  jje: [Kore, [AS], 제주말]
   jut: [Latn, [EU], jysk]
   jv: [Latn, [AS, PA], Jawa]
  # For support in webfonts.
diff --git a/language-data.json b/language-data.json
index 631c51e..4b770fa 100644
--- a/language-data.json
+++ b/language-data.json
@@ -1658,6 +1658,13 @@
             ],
             "жугьури"
         ],
+        "jje": [
+            "Kore",
+            [
+                "AS"
+            ],
+            "제주말"
+        ],
         "jut": [
             "Latn",
             [