If you install the French pack, you launch "AutoCAD 2016 - French" from a separate desktop icon. It is a separate installation profile. You can have English, German, and Korean all installed on the same PC, but you have to close the app and reopen the specific language version you need.
Autodesk doesn't actually make you buy separate software for every country. Instead, they offer Language Packs . Think of them as a linguistic overlay. You keep your core engine (the math, the rendering, the snapping), but you swap the menu bar, the command line, the tooltips, and the dialog boxes into a different human language. You might think, "Just upgrade." But here is why hunting down the AutoCAD 2016 Language Pack is a pro move: autocad 2016 language packs
Let’s be real for a second: In the world of CAD, AutoCAD 2016 is the "vintage leather jacket" of software. It’s not the newest model on the rack (we’re up to 2025 and beyond now), but for thousands of engineers, architects, and drafters, it fits perfectly. It’s stable, it’s reliable, and it doesn’t force you into a subscription nightmare if you own a perpetual license. If you install the French pack, you launch
If you are still running 2016, don't let language be the bottleneck. Find that pack. Install that pack. And watch your international collaboration finally speak the same language—even if the menus don't match. Autodesk doesn't actually make you buy separate software
You cannot switch languages on the fly like a mobile phone.