Librarian Bot: Add language metadata for dataset (#2)

- Librarian Bot: Add language metadata for dataset (82aed5b939bf31c584b70f7c3b01190824096f92)


Co-authored-by: Librarian Bot (Bot) <librarian-bot@users.noreply.huggingface.co>

README.md

@@ -1,4 +1,6 @@
 ---
+language:
+- de
 dataset_info:
   features:
   - name: tokens