Add privacy policy and link to the email step.

src/components/join-flow/email-step.jsx

@@ -155,6 +155,15 @@ class EmailStep extends React.Component {
                                 <FormattedMessage
                                     id="registration.acceptTermsOfUse"
                                     values={{
+                                        privacyPolicyLink: (
+                                            <a
+                                                className="join-flow-link"
+                                                href="/privacy_policy"
+                                                target="_blank"
+                                            >
+                                                <FormattedMessage id="general.privacyPolicy" />
+                                            </a>
+                                        ),
                                         touLink: (
                                             <a
                                                 className="join-flow-link"

src/l10n.json

@@ -215,7 +215,7 @@
     "registration.studentUsernameStepHelpText": "Already have a Scratch account?",
     "registration.studentUsernameStepTooltip": "You'll need to create a new Scratch account to join this class.",
     "registration.studentUsernameFieldHelpText": "For safety, don't use your real name!",
-    "registration.acceptTermsOfUse": "By creating an account, you accept and agree to the {touLink}.",
+    "registration.acceptTermsOfUse": "By creating an account, you acknowledge the {privacyPolicyLink} and you accept and agree to the {touLink}.",
     "registration.usernameStepTitle": "Request a Teacher Account",
     "registration.usernameStepTitleScratcher": "Create a Scratch Account",
     "registration.validationMaxLength": "Sorry, you have exceeded the maximum character limit.",