diff --git a/src/i18n/messages/ar.json b/src/i18n/messages/ar.json
index aeca4ee5..7ab20bb3 100644
--- a/src/i18n/messages/ar.json
+++ b/src/i18n/messages/ar.json
@@ -25,6 +25,13 @@
   "learning.dates.badge.today": "Today",
   "learning.dates.badge.unreleased": "Not Yet Released",
   "learning.dates.badge.verifiedOnly": "Verified Only",
+  "learning.outline.alert.cert.title": "We are working on generating course certificates.",
+  "learning.outline.alert.cert.when": "If you have earned a certificate, you will be able to access it {timeRemaining}. You will also be able to view your certificates on your {profileLink}.",
+  "learning.outline.alert.cert.profile": "Learner Profile",
+  "learning.outline.alert.end.short": "This course is ending {timeRemaining} at {courseEndTime}.",
+  "learning.outline.alert.end.long": "Course starts {timeRemaining} on {courseStartDate}.",
+  "learning.outline.alert.start.short": "Course starts {timeRemaining} at {courseStartTime}.",
+  "learning.outline.alert.end.calendar": "Don’t forget to add a calendar reminder!",
   "learning.outline.dates.all": "View all course dates",
   "learning.outline.dates": "Upcoming Dates",
   "learning.outline.handouts": "Course Handouts",
@@ -41,6 +48,12 @@
   "learning.progress.badge.practiceHidden": "Practice scores are hidden.",
   "learning.progress.badge.noScores": "No problem scores in this section.",
   "learning.progress.badge.scoreEarned": "{earned} of {total} possible points",
+  "learning.progress.badge.viewCert": "View Certificate",
+  "learning.progress.badge.downloadCert": "Download Your Certificate",
+  "learning.progress.badge.requestCert": "Request Certificate",
+  "learning.progress.badge.opensNewWindow": "Opens in a new browser window",
+  "learning.progress.badge.certAlt": "Example Certificate",
+  "learning.progress.badge.studioLink": "View grading in studio",
   "unit.bookmark.button.add.bookmark": "Bookmark this page",
   "unit.bookmark.button.remove.bookmark": "Bookmarked",
   "learning.celebration.completed": "You just completed the first section of your course.",
@@ -136,6 +149,14 @@
   "learn.loading.error": "Error: {error}",
   "learn.redirect.interstitial.message": "Redirecting...",
   "learn.course.tabs.navigation.overflow.menu": "More...",
+  "masquerade-widget.status.groupName": "You are masquerading as a learner in the {groupName} group.",
+  "masquerade-widget.status.learner": "You are masquerading as a learner.",
+  "masquerade-widget.status.userName": "You are masquerading as the following user: {userName}",
+  "masquerade-widget.userName.input.label": "Masquerade as this user",
+  "masquerade-widget.userName.error.generic": "An error has occurred; please try again.",
+  "masquerade-widget.userName.input.placeholder": "username or email",
   "learning.loading.failure": "There was an error loading this course.",
-  "learning.loading": "Loading course page…"
+  "learning.loading": "Loading course page…",
+  "learning.datesResetSuccessBody": "View all dates",
+  "learning.datesResetSuccessHeader": "Your due dates have been successfully shifted to help you stay on track."
 }
\ No newline at end of file
diff --git a/src/i18n/messages/es_419.json b/src/i18n/messages/es_419.json
index 0c4f66be..650248c4 100644
--- a/src/i18n/messages/es_419.json
+++ b/src/i18n/messages/es_419.json
@@ -25,6 +25,13 @@
   "learning.dates.badge.today": "Hoy",
   "learning.dates.badge.unreleased": "Aún No Liberado",
   "learning.dates.badge.verifiedOnly": "Solo Verificado",
+  "learning.outline.alert.cert.title": "We are working on generating course certificates.",
+  "learning.outline.alert.cert.when": "If you have earned a certificate, you will be able to access it {timeRemaining}. You will also be able to view your certificates on your {profileLink}.",
+  "learning.outline.alert.cert.profile": "Learner Profile",
+  "learning.outline.alert.end.short": "This course is ending {timeRemaining} at {courseEndTime}.",
+  "learning.outline.alert.end.long": "Course starts {timeRemaining} on {courseStartDate}.",
+  "learning.outline.alert.start.short": "Course starts {timeRemaining} at {courseStartTime}.",
+  "learning.outline.alert.end.calendar": "Don’t forget to add a calendar reminder!",
   "learning.outline.dates.all": "Ver todas las fechas del curso",
   "learning.outline.dates": "Próximas fechas",
   "learning.outline.handouts": "Materiales del curso",
@@ -41,6 +48,12 @@
   "learning.progress.badge.practiceHidden": "Practice scores are hidden.",
   "learning.progress.badge.noScores": "No problem scores in this section.",
   "learning.progress.badge.scoreEarned": "{earned} of {total} possible points",
+  "learning.progress.badge.viewCert": "View Certificate",
+  "learning.progress.badge.downloadCert": "Download Your Certificate",
+  "learning.progress.badge.requestCert": "Request Certificate",
+  "learning.progress.badge.opensNewWindow": "Opens in a new browser window",
+  "learning.progress.badge.certAlt": "Example Certificate",
+  "learning.progress.badge.studioLink": "View grading in studio",
   "unit.bookmark.button.add.bookmark": "Marcar esta página",
   "unit.bookmark.button.remove.bookmark": "Página marcada",
   "learning.celebration.completed": "You just completed the first section of your course.",
@@ -136,6 +149,14 @@
   "learn.loading.error": "Error: {error}",
   "learn.redirect.interstitial.message": "Redirecting...",
   "learn.course.tabs.navigation.overflow.menu": "More...",
+  "masquerade-widget.status.groupName": "You are masquerading as a learner in the {groupName} group.",
+  "masquerade-widget.status.learner": "You are masquerading as a learner.",
+  "masquerade-widget.status.userName": "You are masquerading as the following user: {userName}",
+  "masquerade-widget.userName.input.label": "Masquerade as this user",
+  "masquerade-widget.userName.error.generic": "An error has occurred; please try again.",
+  "masquerade-widget.userName.input.placeholder": "username or email",
   "learning.loading.failure": "There was an error loading this course.",
-  "learning.loading": "Loading course page…"
+  "learning.loading": "Loading course page…",
+  "learning.datesResetSuccessBody": "View all dates",
+  "learning.datesResetSuccessHeader": "Your due dates have been successfully shifted to help you stay on track."
 }
\ No newline at end of file
diff --git a/src/i18n/messages/fr.json b/src/i18n/messages/fr.json
index aeca4ee5..7ab20bb3 100644
--- a/src/i18n/messages/fr.json
+++ b/src/i18n/messages/fr.json
@@ -25,6 +25,13 @@
   "learning.dates.badge.today": "Today",
   "learning.dates.badge.unreleased": "Not Yet Released",
   "learning.dates.badge.verifiedOnly": "Verified Only",
+  "learning.outline.alert.cert.title": "We are working on generating course certificates.",
+  "learning.outline.alert.cert.when": "If you have earned a certificate, you will be able to access it {timeRemaining}. You will also be able to view your certificates on your {profileLink}.",
+  "learning.outline.alert.cert.profile": "Learner Profile",
+  "learning.outline.alert.end.short": "This course is ending {timeRemaining} at {courseEndTime}.",
+  "learning.outline.alert.end.long": "Course starts {timeRemaining} on {courseStartDate}.",
+  "learning.outline.alert.start.short": "Course starts {timeRemaining} at {courseStartTime}.",
+  "learning.outline.alert.end.calendar": "Don’t forget to add a calendar reminder!",
   "learning.outline.dates.all": "View all course dates",
   "learning.outline.dates": "Upcoming Dates",
   "learning.outline.handouts": "Course Handouts",
@@ -41,6 +48,12 @@
   "learning.progress.badge.practiceHidden": "Practice scores are hidden.",
   "learning.progress.badge.noScores": "No problem scores in this section.",
   "learning.progress.badge.scoreEarned": "{earned} of {total} possible points",
+  "learning.progress.badge.viewCert": "View Certificate",
+  "learning.progress.badge.downloadCert": "Download Your Certificate",
+  "learning.progress.badge.requestCert": "Request Certificate",
+  "learning.progress.badge.opensNewWindow": "Opens in a new browser window",
+  "learning.progress.badge.certAlt": "Example Certificate",
+  "learning.progress.badge.studioLink": "View grading in studio",
   "unit.bookmark.button.add.bookmark": "Bookmark this page",
   "unit.bookmark.button.remove.bookmark": "Bookmarked",
   "learning.celebration.completed": "You just completed the first section of your course.",
@@ -136,6 +149,14 @@
   "learn.loading.error": "Error: {error}",
   "learn.redirect.interstitial.message": "Redirecting...",
   "learn.course.tabs.navigation.overflow.menu": "More...",
+  "masquerade-widget.status.groupName": "You are masquerading as a learner in the {groupName} group.",
+  "masquerade-widget.status.learner": "You are masquerading as a learner.",
+  "masquerade-widget.status.userName": "You are masquerading as the following user: {userName}",
+  "masquerade-widget.userName.input.label": "Masquerade as this user",
+  "masquerade-widget.userName.error.generic": "An error has occurred; please try again.",
+  "masquerade-widget.userName.input.placeholder": "username or email",
   "learning.loading.failure": "There was an error loading this course.",
-  "learning.loading": "Loading course page…"
+  "learning.loading": "Loading course page…",
+  "learning.datesResetSuccessBody": "View all dates",
+  "learning.datesResetSuccessHeader": "Your due dates have been successfully shifted to help you stay on track."
 }
\ No newline at end of file
diff --git a/src/i18n/messages/zh_CN.json b/src/i18n/messages/zh_CN.json
index aeca4ee5..7ab20bb3 100644
--- a/src/i18n/messages/zh_CN.json
+++ b/src/i18n/messages/zh_CN.json
@@ -25,6 +25,13 @@
   "learning.dates.badge.today": "Today",
   "learning.dates.badge.unreleased": "Not Yet Released",
   "learning.dates.badge.verifiedOnly": "Verified Only",
+  "learning.outline.alert.cert.title": "We are working on generating course certificates.",
+  "learning.outline.alert.cert.when": "If you have earned a certificate, you will be able to access it {timeRemaining}. You will also be able to view your certificates on your {profileLink}.",
+  "learning.outline.alert.cert.profile": "Learner Profile",
+  "learning.outline.alert.end.short": "This course is ending {timeRemaining} at {courseEndTime}.",
+  "learning.outline.alert.end.long": "Course starts {timeRemaining} on {courseStartDate}.",
+  "learning.outline.alert.start.short": "Course starts {timeRemaining} at {courseStartTime}.",
+  "learning.outline.alert.end.calendar": "Don’t forget to add a calendar reminder!",
   "learning.outline.dates.all": "View all course dates",
   "learning.outline.dates": "Upcoming Dates",
   "learning.outline.handouts": "Course Handouts",
@@ -41,6 +48,12 @@
   "learning.progress.badge.practiceHidden": "Practice scores are hidden.",
   "learning.progress.badge.noScores": "No problem scores in this section.",
   "learning.progress.badge.scoreEarned": "{earned} of {total} possible points",
+  "learning.progress.badge.viewCert": "View Certificate",
+  "learning.progress.badge.downloadCert": "Download Your Certificate",
+  "learning.progress.badge.requestCert": "Request Certificate",
+  "learning.progress.badge.opensNewWindow": "Opens in a new browser window",
+  "learning.progress.badge.certAlt": "Example Certificate",
+  "learning.progress.badge.studioLink": "View grading in studio",
   "unit.bookmark.button.add.bookmark": "Bookmark this page",
   "unit.bookmark.button.remove.bookmark": "Bookmarked",
   "learning.celebration.completed": "You just completed the first section of your course.",
@@ -136,6 +149,14 @@
   "learn.loading.error": "Error: {error}",
   "learn.redirect.interstitial.message": "Redirecting...",
   "learn.course.tabs.navigation.overflow.menu": "More...",
+  "masquerade-widget.status.groupName": "You are masquerading as a learner in the {groupName} group.",
+  "masquerade-widget.status.learner": "You are masquerading as a learner.",
+  "masquerade-widget.status.userName": "You are masquerading as the following user: {userName}",
+  "masquerade-widget.userName.input.label": "Masquerade as this user",
+  "masquerade-widget.userName.error.generic": "An error has occurred; please try again.",
+  "masquerade-widget.userName.input.placeholder": "username or email",
   "learning.loading.failure": "There was an error loading this course.",
-  "learning.loading": "Loading course page…"
+  "learning.loading": "Loading course page…",
+  "learning.datesResetSuccessBody": "View all dates",
+  "learning.datesResetSuccessHeader": "Your due dates have been successfully shifted to help you stay on track."
 }
\ No newline at end of file