Add lang-fallback.json

Author: jirik

lang-fallback.json

@@ -0,0 +1,25 @@
+{
+  "layer-filter": [
+    "in",
+    "layout.text-field",
+    "{name}",
+    "{name_en}"
+  ],
+  "decorators": [
+    {
+      "layout.text-field": "{name:latin}\n{name:nonlatin}",
+      "filter-all-part": [
+        "!has",
+        "name:en"
+      ]
+    },
+    {
+      "layer-name-postfix": "en",
+      "layout.text-field": "{name:en}\n{name:nonlatin}",
+      "filter-all-part": [
+        "has",
+        "name:en"
+      ]
+    }
+  ]
+}