Join the Zoom meeting in a Chrome tab (not the desktop app) — open your Zoom link and pick "Join from your browser".
Come back to this tab and click Start listening.
In the picker, choose "Chrome Tab" → select the Zoom tab → tick "Also share tab audio" → Share.
The original words appear on the left, English on the right, a second or two behind the speech.
Tick the languages that might be spoken — the interpreter auto-detects between them as people talk, even mid-call. Up to 10 at once. Changes apply the next time you press Start.