diff --git a/tools/src/main/java/org/thingsboard/client/tools/i18n/TranslationPruner.java b/tools/src/main/java/org/thingsboard/client/tools/i18n/TranslationPruner.java
new file mode 100644
index 0000000000..0e4516cd63
--- /dev/null
+++ b/tools/src/main/java/org/thingsboard/client/tools/i18n/TranslationPruner.java
@@ -0,0 +1,84 @@
+package org.thingsboard.client.tools.i18n;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+
+
+public class TranslationPruner {
+
+    /**
+     * Recursively collect all JSON keys in dot notation from the given node.
+     */
+    private static void collectKeys(JsonNode node, String prefix, Set<String> keys) {
+        if (!node.isObject()) return;
+        Iterator<Map.Entry<String, JsonNode>> fields = node.fields();
+        while (fields.hasNext()) {
+            Map.Entry<String, JsonNode> entry = fields.next();
+            String key = entry.getKey();
+            String fullKey = prefix.isEmpty() ? key : prefix + "." + key;
+            keys.add(fullKey);
+            collectKeys(entry.getValue(), fullKey, keys);
+        }
+    }
+
+    /**
+     * Prune the translation ObjectNode, keeping only fields whose dot-keys are in the valid set.
+     */
+    private static ObjectNode pruneNode(ObjectNode node, Set<String> keys, String prefix, ObjectMapper mapper) {
+        ObjectNode pruned = mapper.createObjectNode();
+        Iterator<Map.Entry<String, JsonNode>> fields = node.fields();
+        while (fields.hasNext()) {
+            Map.Entry<String, JsonNode> entry = fields.next();
+            String key = entry.getKey();
+            JsonNode value = entry.getValue();
+            String fullKey = prefix.isEmpty() ? key : prefix + "." + key;
+            if (keys.contains(fullKey)) {
+                if (value.isObject()) {
+                    ObjectNode child = pruneNode((ObjectNode) value, keys, fullKey, mapper);
+                    pruned.set(key, child);
+                } else {
+                    pruned.set(key, value);
+                }
+            }
+        }
+        return pruned;
+    }
+
+    public static void main(String[] args) {
+        if (args.length < 3) {
+            System.err.println("Usage: java TranslationPruner <source.json> <reference.json> [output.json]");
+            System.exit(1);
+        }
+        try {
+            File sourceFile = new File(args[0]);
+            File referenceFile = new File(args[1]);
+            File outputFile = new File(args[2]);
+
+            ObjectMapper mapper = new ObjectMapper();
+            JsonNode usRoot = mapper.readTree(referenceFile);
+            Set<String> validKeys = new HashSet<>();
+            collectKeys(usRoot, "", validKeys);
+
+            JsonNode sourceRoot = mapper.readTree(sourceFile);
+            if (!sourceRoot.isObject()) {
+                throw new IllegalArgumentException("Source JSON must be an object at root");
+            }
+            ObjectNode pruned = pruneNode((ObjectNode) sourceRoot, validKeys, "", mapper);
+
+            mapper.writerWithDefaultPrettyPrinter().writeValue(outputFile, pruned);
+            System.out.println("Pruned translation written to " + outputFile.getPath());
+        } catch (IOException e) {
+            e.printStackTrace();
+            System.exit(2);
+        }
+    }
+
+}