BD-3349: Updates to translation API docs

[lydia-xie]

Summary

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Related PRs, issues, or features (optional)

• Closes BD-3349

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[kaiwah]

Thanks and apologies for missing these last round!
Also, should we add the fact that you can grab the locale_id UUID from the GET response? or is it already intuitive enough?

[kaiwah]

LGTM thanks!