improve loading of extension locales with fallback

src/editor/extensions/ext-server_moinsave/ext-server_moinsave.js

@@ -8,13 +8,13 @@
  *  (I agree to dual license my work to additional GPLv2 or later)
  */
 import {canvg} from '../../../external/canvg/canvg.js';
+import {loadExtensionTranslation} from '../../locale.js';
 
 export default {
   name: 'server_moinsave',
   async init ({$, encode64, importLocale}) {
     const svgEditor = this;
-    // eslint-disable-next-line node/no-unsupported-features/es-syntax
-    const {default: strings} = await import(`./locale/${svgEditor.curPrefs.lang}.js`);
+    const strings = await loadExtensionTranslation('server_moinsave', svgEditor.curPrefs.lang);
     const svgCanvas = svgEditor.canvas;
     const saveSvgAction = '/+modify';