I see some translations in the "Suggestions" column, they will need to be approved to move them to the "Current Translations" column.
Sure, you can use the "On instance saving" trigger to send standard and custom e-mails. This will also work when the Instance is in read-only mode and you press the "Save comment" button. P.S. For extra spicy memes, you can add a condition that will -not- send an e-mail if a comment is not add