This changeset also adds name:pl tags to cities. Changeset: 147155650 | OpenStreetMap
I think the regions are okay: Changeset: 147155795 | OpenStreetMap
Also some names in Czech were added here: Changeset: 146631412 | OpenStreetMap
Also alt_names:de and old_names:de tags for towns in Slovenia were changed to name:de, they are also outdated, but the matter is not entirely clear here, e.g. “Marburg an der Drau” is sometimes still used for Maribor: Changeset: 146613084 | OpenStreetMap