Dynamically changing language of pdf viewer

I wanted to configure chunk size on pdf.js so instead of opening pdfs with the link i’m opening them when the iframe of the viewer is initialized with the open function from viewer.js: open: function open(file, args) {... $(element)[0].contentWindow.PDFViewerApplication.open(viewerUrl(), { rangeChunkSize: chunkSize() });

This works fine, but the problem is that i don’t know how to set the local language dynamically. I managed to do it with the function setLanguage ($(element)[0].contentWindow.document.webL10n.setLanguage("sl-SI");), but this changes only 1 part (see the picture)

Is there a better way to do it ?

[ZeviLiao]

viewer.html link add locale query parameter , pdf/web/viewer.html?locale=${langCode}&file= then in viewer.js add two lines in class GenericL10n constructor class GenericL10n { constructor(lang) { const urlParams = new URLSearchParams(window.location.search); lang = urlParams.get(‘locale’); this._lang = lang;

it works for me.

[EugenMayer]

You should rather patch it this way, change the initialization in _initializeL10n

  async _initializeL10n() {
    // HACK START
    const urlParams = new URLSearchParams(window.location.search);
    let urlParamLocale = urlParams.get('locale');
	// HACK END

    this.l10n = this.externalServices.createL10n({
       // HACK START
      locale: urlParamLocale || _app_options.AppOptions.get("locale")
	  // HACK END
    });
    const dir = await this.l10n.getDirection();
    document.getElementsByTagName("html")[0].dir = dir;
  },

or as a patch

--- viewer.js	2022-10-18 12:59:43.380000000 +0200
+++ viewer.js.patched	2022-10-18 13:20:17.595672298 +0200
@@ -1899,9 +1899,13 @@
   },

   async _initializeL10n() {
+    const urlParams = new URLSearchParams(window.location.search);
+    let urlParamlocale = urlParams.get('locale');
+
     this.l10n = this.externalServices.createL10n({
-      locale: _app_options.AppOptions.get("locale")
+      locale: urlParamlocale || _app_options.AppOptions.get("locale")
     });
+
     const dir = await this.l10n.getDirection();
     document.getElementsByTagName("html")[0].dir = dir;
   },
@@ -18623,4 +18627,4 @@

 /******/ })()
 ;
-//# sourceMappingURL=viewer.js.map
\ No newline at end of file
+//# sourceMappingURL=viewer.js.map