1
Add the OBS URL above as a Browser Source in OBS (1920×1080, check "Shutdown source when not visible")
2
Open the stream you want to translate in another Chrome tab (YouTube, Twitch, etc.)
3
Click Start — Chrome will ask which tab to share. Pick the tab with the stream. Check "Share tab audio" in the dialog.
4
Subtitles appear live in OBS in your chosen language. Position them over your camera or wherever you like.