If you are setting up a new computer or deploying to a Spanish-only team, consider skipping the language pack and installing the directly.
Modify the acad.pgp file (found in %APPDATA%\Autodesk\AutoCAD 2025\R25\enu\Support ). After installing the Spanish pack, duplicate the file and rename to acad_es.pgp . Add shortcuts like: autocad 2025 espa%C3%B1ol language pack
Changing the so it always opens in Spanish. If you are setting up a new computer