uppy/website/src/examples/i18n/app.html

<!-- Basic Uppy styles. You can use Transloadit's CDN, Edgly: 
https://transloadit.edgly.net/releases/uppy/v0.22.2/dist/uppy.min.css -->
<link rel="stylesheet" href="/uppy/uppy.min.css">

<div class="UppyDragDrop"></div>

<!-- Load Uppy pre-built bundled version. You can use Transloadit's CDN, Edgly: 
https://transloadit.edgly.net/releases/uppy/v0.22.2/dist/uppy.min.js -->
<script src="/uppy/uppy.min.js"></script>
<script>
  var uppy = Uppy.Core({ debug: true });
  uppy.use(Uppy.DragDrop, {
    target: '.UppyDragDrop',
    locale: {
      strings: {
        dropHereOr: 'Перенесите файлы сюда или',
        browse: 'выберите'
      }
    }
  });
  uppy.use(Uppy.ProgressBar, { target: 'body', fixed: true });
  uppy.use(Uppy.Tus, { endpoint: '//master.tus.io/files/' });
  uppy.run();

  console.log('--> Uppy pre-built version with Tus, DragDrop & Russian language pack has loaded');
</script>