add Ladin (ISO 639-3: lld) language

https://en.wikipedia.org/wiki/Ladin_language

common in certain regions in northern Italy, see
https://wiki.openstreetmap.org/wiki/Multilingual_names#S%C3%BCdtirol_-_Alto_Adige_(South_Tyrol)_and_Trentino

data/languages.json

@@ -365,6 +365,7 @@
   "lil": {},
   "liv": {},
   "lkt": {"nativeName": "Lakȟólʼiyapi"},
+  "lld": {"nativeName": "Ladin"},
   "lmo": {"nativeName": "Lombard"},
   "ln": {"nativeName": "lingála"},
   "lo": {"nativeName": "ລາວ"},
@@ -695,8 +696,8 @@
   "yo": {"nativeName": "Èdè Yorùbá"},
   "yrl": {"nativeName": "nheẽgatu"},
   "yue": {"nativeName": "粵語"},
-  "yue-Hans": {"base": "yue", "script": "Hans", "nativeName": "粵语（简体）"},
-  "yue-Hant": {"base": "yue", "script": "Hant", "nativeName": "粵語（繁體）"},
+  "yue-Hans": {"base": "yue", "script": "Hans"},
+  "yue-Hant": {"base": "yue", "script": "Hant"},
   "za": {"nativeName": "Vahcuengh"},
   "zap": {},
   "zbl": {},

scripts/language_names.js

@@ -113,6 +113,9 @@ function getLangNamesInNativeLang() {
       base: 'ko',
       script: 'Latn'
     },
+    'lld': {
+      nativeName: 'Ladin'
+    },
     'mnc-Latn': {
       base: 'mnc',
       script: 'Latn',