When installing Inventor, the desktop shortcut shall be named according to the installed language pack.
And a separate desktop shortcut shall be created for each (additionally) installed language pack.
Example:
Autodesk Inventor Professional 2020 (ENU).lnk
Autodesk Inventor Professional 2020 (DEU).lnk
Also, the shortcut target path shall include the language flag by default ( "C:\Program Files\Autodesk\Inventor 2020\Bin\Inventor.exe" /language=ENU ).