Verify language json files format (#5233)

.github/workflows/json-yaml-validate.yml

@@ -25,3 +25,13 @@ jobs:
         with:
           comment: "true" # enable comment mode
           exclude_file: ".github/config/exclude.txt" # gitignore style file for exclusions
+
+  check-lang-json:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+      - run: node ./extra/check-lang-json.js

extra/check-lang-json.js

@@ -0,0 +1,27 @@
+// For #5231
+
+const fs = require("fs");
+
+let path = "./src/lang";
+
+// list directories in the lang directory
+let jsonFileList = fs.readdirSync(path);
+
+for (let jsonFile of jsonFileList) {
+    if (!jsonFile.endsWith(".json")) {
+        continue;
+    }
+
+    let jsonPath = path + "/" + jsonFile;
+    let originalContent = fs.readFileSync(jsonPath, "utf8");
+    let langData = JSON.parse(originalContent);
+
+    let formattedContent = JSON.stringify(langData, null, 4) + "\n";
+
+    if (originalContent !== formattedContent) {
+        console.error(`File ${jsonFile} is not formatted correctly.`);
+        process.exit(1);
+    }
+}
+
+console.log("All lang json files are formatted correctly.");