Users can receive an email when their access to a collection is expiring soon (https://github.com/WikipediaLibrary/TWLight/blob/37e171e8d37137effd5d8ad24a17cdcd4567dde9/TWLight/emails/templates/emails/user_renewal_notice-body-html.html). This email tells them to click the 'Renew' button, but that button can also say 'Extend', which is confusing.
Instead of "by clicking the Renew button", this email should say "by clicking the 'Renew' or 'Extend' button".