added localization

src/assets/js/module.locale.js

+const electron = require('electron');
+const path = require('path');
+const fs = require('fs');
+
+class Locale {
+  constructor(localeToLoad) {
+    this.localePath = path.join(__dirname, "..", "..", "locale", localeToLoad + '.json');
+    this.fallbackPath = path.join(__dirname, "..", "..", "locale", 'en.json');
+
+    // Fallback to "en" if language is not supported
+    if(fs.existsSync(this.localePath)) {
+        this.path = this.localePath;
+    } else {
+        this.path = this.fallbackPath;
+    }
+
+    this.strings = parseDataFile(this.path);
+    console.log("Loaded Locale " + localeToLoad);
+  }
+  
+  get(key) {
+    return this.strings[key];
+  }
+}
+
+function parseDataFile(filePath) {
+  try {
+    return JSON.parse(fs.readFileSync(filePath));
+  } catch(error) {
+      throw error;
+  }
+}
+
+module.exports = Locale;
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