The Windows Start menu provides the main way to launch the Autodesk product in another language, as separate shortcuts are listed for all installed languages.
The general product launch icon on the desktop, without a specified language, behaves differently in AutoCAD and Inventor.
General desktop icon
For AutoCAD, this icon always launches the original language in which the product was installed. For Inventor, this icon launches the current language, which is the language last used. Similarly, opening an Inventor file always starts the current language version. When Inventor is launched from a language-specific Start menu shortcut or desktop icon, that language becomes the current language.