Windows Live Captions projects captions onto your screen while you speak.  You can choose between several different languages, but you can only project one language.

Note: this doesn't just work for live speaking- it picks up on videos and podcasts too!

In order to use Windows Live Captions, you need Windows 11.  All devices should have already been updated to Windows 11.  You know you have Windows 11 if your bottom menu is centered like in the image below.