Around the time of the Toolserver shutdown, WIWOSM started fetching tiles from the tiles.wmflabs.org/osm-multilingual tile server. But as far as I can tell, it only supports de, en, fi, fr, pt, and ru. For other languages, it seems to return only a few tiles that had been generated before the switchover.
Are there plans to extend this service to the wide range of languages supported by the old multilingual tile server? In particular, openstreetmap.vn and the OSM gadget at the Vietnamese Wikipedia both make use of the multilingual tiles, but now most Wikipedia articles end up showing the default OSM tiles.