Librarian Bot: Add language metadata for dataset (#1)

- Librarian Bot: Add language metadata for dataset (787e7c9a02ffcc78440137d91cb686e7c9fb3695)


Co-authored-by: Librarian Bot (Bot) <[email protected]>

README.md

@@ -1,3 +1,5 @@
 ---
+language:
+- de
 license: apache-2.0
 ---