Changing language after update from 3.x to 4.8.69 is not working

[erek-optimal]

Hi,

so i am integrating pdf.js as a bundle into my service and customizing some stuff with an own pdf.ts file. In this file i was also applying a new locale to my viewer. I found out, that a lot has changed since the 3.x version, so i tried to find out, how to enable this functionality with the new 4.x version. I tried a lot of things, but even though my locale is set codewise, it is not being applied in the viewer. So i kindly need your support in this matter. What am i missing out?

Here is my old working code from 3.x version:

const setLanguage = (locale: string) => {
  if (locale) {
    // @ts-ignore
    PDFViewerApplicationOptions.set('locale', locale);
    // @ts-ignore
    document.webL10n.setLanguage(locale);
    // @ts-ignore
    PDFViewerApplication._initializeL10n();
  }
};

And here is my new approach for 4.8.69, which is not working:

const setLanguage = (locale: string) => {
  if (locale) {
    // @ts-ignore
    PDFViewerApplicationOptions.set('localeProperties', {lang: locale});
  }
};

I guess there has to be also a similar approach to now set and initialize it like it was before but now for fluent, but i could not find any documentation for it.

Thanks in advance for every reply and help!

BR