- Do I need a Google Workspace plan?
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No. Subtitles has nothing to do with your Google account: it captions the audio your Mac plays, on a free Gmail account or an Enterprise tenant alike.
- Does it translate the call?
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Yes, since 1.3. Pick a language in Translate To and the call arrives in it, translated on your Mac rather than on anyone's server. Meet's own translated captions need Workspace Business Standard or above; this needs macOS 15 and nothing else. Left off, it captions what is said in the language it was said in.
- Do the captions stay visible when I switch tabs?
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Yes. That is the main reason to use it over Meet's own: the overlay is a separate always-on-top layer, so leaving the Meet tab does not take the captions with it.
- Does anything go to Google?
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No. After the one-time model download the only requests left are a
daily check for a newer version, which you can decline, and a
monthly check of your licence key once you have one. The audio never
leaves your Mac.
- Does it work with Meet in Safari, Chrome or Arc?
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Any of them. It captures an app and every helper process it spawns, which is what all three are underneath.