diff --git a/src/i18n/messages/ar.json b/src/i18n/messages/ar.json
index 46b357cd..99a48791 100644
--- a/src/i18n/messages/ar.json
+++ b/src/i18n/messages/ar.json
@@ -1,4 +1,6 @@
 {
+  "navigation.course.tabs.label": "Course Material",
+  "learn.course.tabs.navigation.overflow.menu": "More...",
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Reason",
   "discussions.post.closedBy": "Post closed by",
   "discussion.comment.repliesHeading": "{count} replies for the response added",
+  "discussion.comment.time": "{time} ago",
   "discussions.learner.reported": "{reported} reported",
   "discussions.learner.previouslyReported": "{previouslyReported} previously reported",
   "discussions.learner.lastLogin": "Last active {lastActiveTime}",
@@ -41,6 +44,7 @@
   "discussions.learner.reportedActivity": "Reported activity",
   "discussions.learner.sortFilterStatus": "All learners by {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n    }",
   "discussions.actions.button.alt": "Actions menu",
+  "discussions.actions.back.alt": "Back",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
   "discussions.actions.reopen": "Reopen",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "No topic selected",
   "discussions.sidebar.noResultsFound": "No results found",
   "discussions.sidebar.removeKeywords": "Try searching different keywords or removing some filters",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Try removing some filters",
   "discussions.empty.iconAlt": "Empty",
   "discussions.authors.label.staff": "Staff",
   "discussions.authors.label.ta": "TA",
   "discussions.learner.loadMostPosts": "Load more posts",
+  "discussions.post.anonymous.author": "anonymous",
   "discussions.navigation.breadcrumbMenu.allTopics": "Topics",
   "discussions.navigation.breadcrumbMenu.showAll": "Show all",
   "discussions.navigation.navigationBar.allPosts": "All posts",
@@ -76,7 +82,8 @@
   "discussions.posts.actionBar.searchAllPosts": "Search all posts",
   "discussions.posts.actionBar.search": "{page, select,\n      topics {Find a topic}\n      posts {Search all posts}\n      learners {Search learner}\n      myPosts {Search all posts}\n    }",
   "discussions.actionBar.searchInfo": "Showing {count} results for \"{text}\"",
-  "discussions.actionBar.clearSearch": "Clear",
+  "discussions.actionBar.searchInfoSearching": "Searching...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Add a post",
   "discussion.posts.actionBar.close": "Close",
   "discussions.post.editor.type": "Post type",
diff --git a/src/i18n/messages/de_DE.json b/src/i18n/messages/de_DE.json
index 46b357cd..99a48791 100644
--- a/src/i18n/messages/de_DE.json
+++ b/src/i18n/messages/de_DE.json
@@ -1,4 +1,6 @@
 {
+  "navigation.course.tabs.label": "Course Material",
+  "learn.course.tabs.navigation.overflow.menu": "More...",
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Reason",
   "discussions.post.closedBy": "Post closed by",
   "discussion.comment.repliesHeading": "{count} replies for the response added",
+  "discussion.comment.time": "{time} ago",
   "discussions.learner.reported": "{reported} reported",
   "discussions.learner.previouslyReported": "{previouslyReported} previously reported",
   "discussions.learner.lastLogin": "Last active {lastActiveTime}",
@@ -41,6 +44,7 @@
   "discussions.learner.reportedActivity": "Reported activity",
   "discussions.learner.sortFilterStatus": "All learners by {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n    }",
   "discussions.actions.button.alt": "Actions menu",
+  "discussions.actions.back.alt": "Back",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
   "discussions.actions.reopen": "Reopen",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "No topic selected",
   "discussions.sidebar.noResultsFound": "No results found",
   "discussions.sidebar.removeKeywords": "Try searching different keywords or removing some filters",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Try removing some filters",
   "discussions.empty.iconAlt": "Empty",
   "discussions.authors.label.staff": "Staff",
   "discussions.authors.label.ta": "TA",
   "discussions.learner.loadMostPosts": "Load more posts",
+  "discussions.post.anonymous.author": "anonymous",
   "discussions.navigation.breadcrumbMenu.allTopics": "Topics",
   "discussions.navigation.breadcrumbMenu.showAll": "Show all",
   "discussions.navigation.navigationBar.allPosts": "All posts",
@@ -76,7 +82,8 @@
   "discussions.posts.actionBar.searchAllPosts": "Search all posts",
   "discussions.posts.actionBar.search": "{page, select,\n      topics {Find a topic}\n      posts {Search all posts}\n      learners {Search learner}\n      myPosts {Search all posts}\n    }",
   "discussions.actionBar.searchInfo": "Showing {count} results for \"{text}\"",
-  "discussions.actionBar.clearSearch": "Clear",
+  "discussions.actionBar.searchInfoSearching": "Searching...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Add a post",
   "discussion.posts.actionBar.close": "Close",
   "discussions.post.editor.type": "Post type",
diff --git a/src/i18n/messages/es_419.json b/src/i18n/messages/es_419.json
index 0ccb98d5..280e9128 100644
--- a/src/i18n/messages/es_419.json
+++ b/src/i18n/messages/es_419.json
@@ -1,4 +1,6 @@
 {
+  "navigation.course.tabs.label": "Course Material",
+  "learn.course.tabs.navigation.overflow.menu": "More...",
   "discussions.comments.comment.addResponse": "Agregar una respuesta",
   "discussions.comments.comment.addComment": "Agregar un comentario",
   "discussions.comments.comment.abuseFlaggedMessage": "Contenido informado para que el personal lo revise",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Motivo",
   "discussions.post.closedBy": "Publicación cerrada por",
   "discussion.comment.repliesHeading": "{count} respuestas para la respuesta añadida",
+  "discussion.comment.time": "{time} ago",
   "discussions.learner.reported": "{reported} informado",
   "discussions.learner.previouslyReported": "{previouslyReported} informado anteriormente",
   "discussions.learner.lastLogin": "Último activo {lastActiveTime}",
@@ -41,6 +44,7 @@
   "discussions.learner.reportedActivity": "Actividad reportada",
   "discussions.learner.sortFilterStatus": "Todos los alumnos por {sort, select, flagged {reported activity} actividad {most activity} }",
   "discussions.actions.button.alt": "Menú de acciones",
+  "discussions.actions.back.alt": "Back",
   "discussions.actions.unpin": "Desmarcar",
   "discussions.actions.close": "Cerrar",
   "discussions.actions.reopen": "Reabrir",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "Ningún tema seleccionado",
   "discussions.sidebar.noResultsFound": "No se han encontrado resultados",
   "discussions.sidebar.removeKeywords": "Intente buscar diferentes palabras clave o elimine algunos filtros.",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Pruebe eliminando algunos filtros.",
   "discussions.empty.iconAlt": "Vacío",
   "discussions.authors.label.staff": "Equipo del curso",
   "discussions.authors.label.ta": "ejército de reserva",
   "discussions.learner.loadMostPosts": "Cargar más mensajes\n",
+  "discussions.post.anonymous.author": "anonymous",
   "discussions.navigation.breadcrumbMenu.allTopics": "Temas",
   "discussions.navigation.breadcrumbMenu.showAll": "Mostrar todo",
   "discussions.navigation.navigationBar.allPosts": "Todos los mensajes",
@@ -76,7 +82,8 @@
   "discussions.posts.actionBar.searchAllPosts": "Buscar en todas las publicaciones",
   "discussions.posts.actionBar.search": "{page, select, topics {Find a topic} posts {Search all posts} learners {Search learner} myPosts {Search all posts}}",
   "discussions.actionBar.searchInfo": "Mostrando resultados de {count} para "{text}"",
-  "discussions.actionBar.clearSearch": "Borrar",
+  "discussions.actionBar.searchInfoSearching": "Searching...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Agregar una publicación",
   "discussion.posts.actionBar.close": "Cerrar",
   "discussions.post.editor.type": "Tipo de publicación",
diff --git a/src/i18n/messages/fr.json b/src/i18n/messages/fr.json
index 46b357cd..99a48791 100644
--- a/src/i18n/messages/fr.json
+++ b/src/i18n/messages/fr.json
@@ -1,4 +1,6 @@
 {
+  "navigation.course.tabs.label": "Course Material",
+  "learn.course.tabs.navigation.overflow.menu": "More...",
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Reason",
   "discussions.post.closedBy": "Post closed by",
   "discussion.comment.repliesHeading": "{count} replies for the response added",
+  "discussion.comment.time": "{time} ago",
   "discussions.learner.reported": "{reported} reported",
   "discussions.learner.previouslyReported": "{previouslyReported} previously reported",
   "discussions.learner.lastLogin": "Last active {lastActiveTime}",
@@ -41,6 +44,7 @@
   "discussions.learner.reportedActivity": "Reported activity",
   "discussions.learner.sortFilterStatus": "All learners by {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n    }",
   "discussions.actions.button.alt": "Actions menu",
+  "discussions.actions.back.alt": "Back",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
   "discussions.actions.reopen": "Reopen",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "No topic selected",
   "discussions.sidebar.noResultsFound": "No results found",
   "discussions.sidebar.removeKeywords": "Try searching different keywords or removing some filters",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Try removing some filters",
   "discussions.empty.iconAlt": "Empty",
   "discussions.authors.label.staff": "Staff",
   "discussions.authors.label.ta": "TA",
   "discussions.learner.loadMostPosts": "Load more posts",
+  "discussions.post.anonymous.author": "anonymous",
   "discussions.navigation.breadcrumbMenu.allTopics": "Topics",
   "discussions.navigation.breadcrumbMenu.showAll": "Show all",
   "discussions.navigation.navigationBar.allPosts": "All posts",
@@ -76,7 +82,8 @@
   "discussions.posts.actionBar.searchAllPosts": "Search all posts",
   "discussions.posts.actionBar.search": "{page, select,\n      topics {Find a topic}\n      posts {Search all posts}\n      learners {Search learner}\n      myPosts {Search all posts}\n    }",
   "discussions.actionBar.searchInfo": "Showing {count} results for \"{text}\"",
-  "discussions.actionBar.clearSearch": "Clear",
+  "discussions.actionBar.searchInfoSearching": "Searching...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Add a post",
   "discussion.posts.actionBar.close": "Close",
   "discussions.post.editor.type": "Post type",
diff --git a/src/i18n/messages/fr_CA.json b/src/i18n/messages/fr_CA.json
index dd3f4c9e..21d7143c 100644
--- a/src/i18n/messages/fr_CA.json
+++ b/src/i18n/messages/fr_CA.json
@@ -1,4 +1,6 @@
 {
+  "navigation.course.tabs.label": "Matériel de cours",
+  "learn.course.tabs.navigation.overflow.menu": "Plus...",
   "discussions.comments.comment.addResponse": "Ajouter une réponse",
   "discussions.comments.comment.addComment": "Ajouter un commentaire",
   "discussions.comments.comment.abuseFlaggedMessage": "Contenu signalé au personnel pour examen",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Raison",
   "discussions.post.closedBy": "Message fermé par",
   "discussion.comment.repliesHeading": "{count} réponses pour la réponse ajoutée",
+  "discussion.comment.time": "il y a {time}",
   "discussions.learner.reported": "{reported} signalé",
   "discussions.learner.previouslyReported": "{previouslyReported} signalé précédemment",
   "discussions.learner.lastLogin": "Dernier actif {lastActiveTime}",
@@ -41,6 +44,7 @@
   "discussions.learner.reportedActivity": "Activité signalée",
   "discussions.learner.sortFilterStatus": "Tous les apprenants par {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n    }",
   "discussions.actions.button.alt": "Menu Actions",
+  "discussions.actions.back.alt": "Retour",
   "discussions.actions.unpin": "Détacher",
   "discussions.actions.close": "Fermer",
   "discussions.actions.reopen": "Rouvrir",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "Aucun sujet sélectionné",
   "discussions.sidebar.noResultsFound": "Aucun résultat trouvé",
   "discussions.sidebar.removeKeywords": "Essayez de rechercher différents mots clés ou de supprimer certains filtres",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Essayez de supprimer certains filtres",
   "discussions.empty.iconAlt": "Vide",
   "discussions.authors.label.staff": "Équipe pédagogique",
   "discussions.authors.label.ta": "assistant d'enseignement",
   "discussions.learner.loadMostPosts": "Charger plus de messages",
+  "discussions.post.anonymous.author": "anonyme",
   "discussions.navigation.breadcrumbMenu.allTopics": "Sujets",
   "discussions.navigation.breadcrumbMenu.showAll": "Tout afficher",
   "discussions.navigation.navigationBar.allPosts": "Tous les messages",
@@ -76,7 +82,8 @@
   "discussions.posts.actionBar.searchAllPosts": "Recherche dans les messages",
   "discussions.posts.actionBar.search": "{page, select,\n      topics {Find a topic}\n      posts {Search all posts}\n      learners {Search learner}\n      myPosts {Search all posts}\n    }",
   "discussions.actionBar.searchInfo": "Affichage des résultats {count} pour \"{text}\"",
-  "discussions.actionBar.clearSearch": "Effacer",
+  "discussions.actionBar.searchInfoSearching": "Recherche...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Ajouter un message",
   "discussion.posts.actionBar.close": "Fermer",
   "discussions.post.editor.type": "Type de message",
@@ -129,7 +136,7 @@
   "discussions.post.answered": "Répondu",
   "discussions.post.unFollow": "Ne plus suivre",
   "discussions.post.like": "Aime",
-  "discussions.post.removeLike": "Unlike",
+  "discussions.post.removeLike": "Contrairement à",
   "discussions.post.viewActivity": "Afficher l'activité",
   "discussions.post.closed": "Message fermé pour réponses et commentaires",
   "discussions.post.relatedTo": "Relative à",
diff --git a/src/i18n/messages/fr_FR.json b/src/i18n/messages/fr_FR.json
index 46b357cd..99a48791 100644
--- a/src/i18n/messages/fr_FR.json
+++ b/src/i18n/messages/fr_FR.json
@@ -1,4 +1,6 @@
 {
+  "navigation.course.tabs.label": "Course Material",
+  "learn.course.tabs.navigation.overflow.menu": "More...",
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Reason",
   "discussions.post.closedBy": "Post closed by",
   "discussion.comment.repliesHeading": "{count} replies for the response added",
+  "discussion.comment.time": "{time} ago",
   "discussions.learner.reported": "{reported} reported",
   "discussions.learner.previouslyReported": "{previouslyReported} previously reported",
   "discussions.learner.lastLogin": "Last active {lastActiveTime}",
@@ -41,6 +44,7 @@
   "discussions.learner.reportedActivity": "Reported activity",
   "discussions.learner.sortFilterStatus": "All learners by {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n    }",
   "discussions.actions.button.alt": "Actions menu",
+  "discussions.actions.back.alt": "Back",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
   "discussions.actions.reopen": "Reopen",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "No topic selected",
   "discussions.sidebar.noResultsFound": "No results found",
   "discussions.sidebar.removeKeywords": "Try searching different keywords or removing some filters",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Try removing some filters",
   "discussions.empty.iconAlt": "Empty",
   "discussions.authors.label.staff": "Staff",
   "discussions.authors.label.ta": "TA",
   "discussions.learner.loadMostPosts": "Load more posts",
+  "discussions.post.anonymous.author": "anonymous",
   "discussions.navigation.breadcrumbMenu.allTopics": "Topics",
   "discussions.navigation.breadcrumbMenu.showAll": "Show all",
   "discussions.navigation.navigationBar.allPosts": "All posts",
@@ -76,7 +82,8 @@
   "discussions.posts.actionBar.searchAllPosts": "Search all posts",
   "discussions.posts.actionBar.search": "{page, select,\n      topics {Find a topic}\n      posts {Search all posts}\n      learners {Search learner}\n      myPosts {Search all posts}\n    }",
   "discussions.actionBar.searchInfo": "Showing {count} results for \"{text}\"",
-  "discussions.actionBar.clearSearch": "Clear",
+  "discussions.actionBar.searchInfoSearching": "Searching...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Add a post",
   "discussion.posts.actionBar.close": "Close",
   "discussions.post.editor.type": "Post type",
diff --git a/src/i18n/messages/it_IT.json b/src/i18n/messages/it_IT.json
index 46b357cd..99a48791 100644
--- a/src/i18n/messages/it_IT.json
+++ b/src/i18n/messages/it_IT.json
@@ -1,4 +1,6 @@
 {
+  "navigation.course.tabs.label": "Course Material",
+  "learn.course.tabs.navigation.overflow.menu": "More...",
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Reason",
   "discussions.post.closedBy": "Post closed by",
   "discussion.comment.repliesHeading": "{count} replies for the response added",
+  "discussion.comment.time": "{time} ago",
   "discussions.learner.reported": "{reported} reported",
   "discussions.learner.previouslyReported": "{previouslyReported} previously reported",
   "discussions.learner.lastLogin": "Last active {lastActiveTime}",
@@ -41,6 +44,7 @@
   "discussions.learner.reportedActivity": "Reported activity",
   "discussions.learner.sortFilterStatus": "All learners by {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n    }",
   "discussions.actions.button.alt": "Actions menu",
+  "discussions.actions.back.alt": "Back",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
   "discussions.actions.reopen": "Reopen",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "No topic selected",
   "discussions.sidebar.noResultsFound": "No results found",
   "discussions.sidebar.removeKeywords": "Try searching different keywords or removing some filters",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Try removing some filters",
   "discussions.empty.iconAlt": "Empty",
   "discussions.authors.label.staff": "Staff",
   "discussions.authors.label.ta": "TA",
   "discussions.learner.loadMostPosts": "Load more posts",
+  "discussions.post.anonymous.author": "anonymous",
   "discussions.navigation.breadcrumbMenu.allTopics": "Topics",
   "discussions.navigation.breadcrumbMenu.showAll": "Show all",
   "discussions.navigation.navigationBar.allPosts": "All posts",
@@ -76,7 +82,8 @@
   "discussions.posts.actionBar.searchAllPosts": "Search all posts",
   "discussions.posts.actionBar.search": "{page, select,\n      topics {Find a topic}\n      posts {Search all posts}\n      learners {Search learner}\n      myPosts {Search all posts}\n    }",
   "discussions.actionBar.searchInfo": "Showing {count} results for \"{text}\"",
-  "discussions.actionBar.clearSearch": "Clear",
+  "discussions.actionBar.searchInfoSearching": "Searching...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Add a post",
   "discussion.posts.actionBar.close": "Close",
   "discussions.post.editor.type": "Post type",
diff --git a/src/i18n/messages/pl.json b/src/i18n/messages/pl.json
index b1fe075c..c4aae2d9 100644
--- a/src/i18n/messages/pl.json
+++ b/src/i18n/messages/pl.json
@@ -1,16 +1,18 @@
 {
+  "navigation.course.tabs.label": "Course Material",
+  "learn.course.tabs.navigation.overflow.menu": "More...",
   "discussions.comments.comment.addResponse": "Dodaj odpowiedź",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
-  "discussions.comments.comment.responseCount": "{num, plural,\n      =0 {No responses}\n      one {Showing # response}\n      other {Showing # responses}\n    }",
-  "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n      =0 {No endorsed responses}\n      one {Showing # endorsed response}\n      other {Showing # endorsed responses}\n    }",
+  "discussions.comments.comment.responseCount": "{num, plural,\n=0 {No responses}\none {Showing # response}\nother {Showing # responses}\n}",
+  "discussions.comments.comment.endorsedResponseCount": "{num, plural,\n=0 {No endorsed responses}\none {Showing # endorsed response}\nother {Showing # endorsed responses}\n}",
   "discussions.comments.comment.loadMoreComments": "Załaduj więcej komentarzy",
   "discussions.comments.comment.loadMoreResponses": "Załaduj więcej odpowiedzi",
-  "discussions.comments.comment.visibility": "This post is visible to {group, select,\n         null {Everyone}\n         other {{group}}\n    }.",
-  "discussions.comments.comment.postedTime": "{postType, select,\n      discussion {Discussion}\n      question {Question}\n    } posted {relativeTime} by",
+  "discussions.comments.comment.visibility": "Ten post jest widoczny dla  {group, select,\n null {Everyone}\nother {{group}}\n }.",
+  "discussions.comments.comment.postedTime": "{postType, select,\ndiscussion {Discussion}\nquestion {Question}\n} wysłane {relativeTime} przez ",
   "discussions.comments.comment.commentTime": "Wysłano {relativeTime}",
   "discussions.comments.comment.answer": "Answer",
-  "discussions.comments.comment.answeredlabel": "Marked as answered by",
+  "discussions.comments.comment.answeredlabel": "Oznaczono jako odpowiedziane przez",
   "discussions.comments.comment.endorsed": "Zatwierdzony",
   "discussions.comments.comment.endorsedlabel": "Zatwierdzony przez",
   "discussions.actions.label": "Actions menu",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Reason",
   "discussions.post.closedBy": "Post zamknięty przez",
   "discussion.comment.repliesHeading": "{count} replies for the response added",
+  "discussion.comment.time": "{time} ago",
   "discussions.learner.reported": "{reported}  zgłoszone",
   "discussions.learner.previouslyReported": "{previouslyReported} previously reported",
   "discussions.learner.lastLogin": "Ostatnia aktywność {lastActiveTime}",
@@ -40,7 +43,8 @@
   "discussions.learner.mostActivity": "Największa aktywność",
   "discussions.learner.reportedActivity": "Zgłoszona aktywność",
   "discussions.learner.sortFilterStatus": "All learners by {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n    }",
-  "discussions.actions.button.alt": "Actions menu",
+  "discussions.actions.button.alt": "Menu czynności",
+  "discussions.actions.back.alt": "Back",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
   "discussions.actions.reopen": "Otwórz ponownie",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "Nie wybrano żadnego tematu",
   "discussions.sidebar.noResultsFound": "No results found",
   "discussions.sidebar.removeKeywords": "Spróbuj wyszukać inne słowa kluczowe lub usunąć niektóre filtry",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Spróbuj usunąć niektóre filtry",
   "discussions.empty.iconAlt": "Empty",
   "discussions.authors.label.staff": "Staff",
   "discussions.authors.label.ta": "TA",
   "discussions.learner.loadMostPosts": "Wczytaj więcej postów",
+  "discussions.post.anonymous.author": "anonymous",
   "discussions.navigation.breadcrumbMenu.allTopics": "Topics",
   "discussions.navigation.breadcrumbMenu.showAll": "Show all",
   "discussions.navigation.navigationBar.allPosts": "Wszystkie posty",
@@ -74,9 +80,10 @@
   "discussions.navigation.navigationBar.learners": "Learners",
   "discussions.app.title": "Discussions",
   "discussions.posts.actionBar.searchAllPosts": "Search all posts",
-  "discussions.posts.actionBar.search": "{page, select,\n      topics {Find a topic}\n      posts {Search all posts}\n      learners {Search learner}\n      myPosts {Search all posts}\n    }",
-  "discussions.actionBar.searchInfo": "Showing {count} results for \"{text}\"",
-  "discussions.actionBar.clearSearch": "Clear",
+  "discussions.posts.actionBar.search": "{page, select,\ntopics {Find a topic}\nposts {Search all posts}\nlearners {Search learner}\nmyPosts {Search all posts}\n}",
+  "discussions.actionBar.searchInfo": "Wyświetlanie {count} wyników dla „{text}”",
+  "discussions.actionBar.searchInfoSearching": "Searching...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Dodaj post",
   "discussion.posts.actionBar.close": "Close",
   "discussions.post.editor.type": "Post type",
@@ -121,7 +128,7 @@
   "discussions.posts.sort.voteCount": "Most likes",
   "discussions.posts.sort-filter.sortFilterStatus": "{own, select,\n      false {All}\n      true {Own}\n    } {status, select,\n      statusAll {}\n      statusUnread {unread}\n      statusFollowing {followed}\n      statusReported {reported}\n      statusUnanswered {unanswered}\n    } {type, select,\n      discussion {discussions}\n      question {questions}\n      all {posts}\n    } {cohortType, select,\n        all {}\n        group {in {cohort}}\n    } by {sort, select,\n      lastActivityAt {recent activity}\n      commentCount {most activity}\n      voteCount {most votes}\n    }",
   "discussions.post.author.anonymous": "anonymous",
-  "discussions.post.lastResponse": "Last response {time}",
+  "discussions.post.lastResponse": "Ostatnia odpowiedź {time}",
   "discussions.post.postedOn": "Posted {time} by {author} {authorLabel}",
   "discussions.post.contentReported": "Reported",
   "discussions.post.following": "Following",
@@ -130,7 +137,7 @@
   "discussions.post.unFollow": "Unfollow",
   "discussions.post.like": "Like",
   "discussions.post.removeLike": "Unlike",
-  "discussions.post.viewActivity": "View activity",
+  "discussions.post.viewActivity": "Zobacz aktywność",
   "discussions.post.closed": "Post closed for responses and comments",
   "discussions.post.relatedTo": "Related to",
   "discussions.editor.delete.post.title": "Usuń post",
@@ -143,7 +150,7 @@
   "discussions.post.label.new": "{count} New",
   "discussions.post.editedBy": "Edytowany przez",
   "discussions.post.editReason": "Reason",
-  "discussions.post.postWithoutPreview": "No preview available",
+  "discussions.post.postWithoutPreview": "Podgląd niedostępny",
   "discussions.topics.sort.message": "Posortowane według {sortBy}",
   "discussions.topics.sort.lastActivity": "Ostatnia aktywność",
   "discussions.topics.sort.commentCount": "Most activity",
diff --git a/src/i18n/messages/tr_TR.json b/src/i18n/messages/tr_TR.json
index a3ae1d64..6cc01588 100644
--- a/src/i18n/messages/tr_TR.json
+++ b/src/i18n/messages/tr_TR.json
@@ -1,4 +1,6 @@
 {
+  "navigation.course.tabs.label": "Course Material",
+  "learn.course.tabs.navigation.overflow.menu": "More...",
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Bir yorum ekleyin",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Gerekçe",
   "discussions.post.closedBy": "Post closed by",
   "discussion.comment.repliesHeading": "{count} replies for the response added",
+  "discussion.comment.time": "{time} ago",
   "discussions.learner.reported": "{reported} reported",
   "discussions.learner.previouslyReported": "{previouslyReported} previously reported",
   "discussions.learner.lastLogin": "Last active {lastActiveTime}",
@@ -41,6 +44,7 @@
   "discussions.learner.reportedActivity": "Reported activity",
   "discussions.learner.sortFilterStatus": "All learners by {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n    }",
   "discussions.actions.button.alt": "Actions menu",
+  "discussions.actions.back.alt": "Back",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Kapat",
   "discussions.actions.reopen": "Reopen",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "No topic selected",
   "discussions.sidebar.noResultsFound": "Sonuç bulunamadı",
   "discussions.sidebar.removeKeywords": "Try searching different keywords or removing some filters",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Try removing some filters",
   "discussions.empty.iconAlt": "Boş",
   "discussions.authors.label.staff": "Personel",
   "discussions.authors.label.ta": "TA",
   "discussions.learner.loadMostPosts": "Load more posts",
+  "discussions.post.anonymous.author": "anonymous",
   "discussions.navigation.breadcrumbMenu.allTopics": "Konular",
   "discussions.navigation.breadcrumbMenu.showAll": "Tümünü göster",
   "discussions.navigation.navigationBar.allPosts": "All posts",
@@ -76,7 +82,8 @@
   "discussions.posts.actionBar.searchAllPosts": "Tüm gönderilerde ara",
   "discussions.posts.actionBar.search": "{page, select,\n      topics {Find a topic}\n      posts {Search all posts}\n      learners {Search learner}\n      myPosts {Search all posts}\n    }",
   "discussions.actionBar.searchInfo": "Showing {count} results for \"{text}\"",
-  "discussions.actionBar.clearSearch": "Clear",
+  "discussions.actionBar.searchInfoSearching": "Searching...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Add a post",
   "discussion.posts.actionBar.close": "Kapat",
   "discussions.post.editor.type": "Gönderi türü",
diff --git a/src/i18n/messages/zh_CN.json b/src/i18n/messages/zh_CN.json
index 46b357cd..99a48791 100644
--- a/src/i18n/messages/zh_CN.json
+++ b/src/i18n/messages/zh_CN.json
@@ -1,4 +1,6 @@
 {
+  "navigation.course.tabs.label": "Course Material",
+  "learn.course.tabs.navigation.overflow.menu": "More...",
   "discussions.comments.comment.addResponse": "Add a response",
   "discussions.comments.comment.addComment": "Add a comment",
   "discussions.comments.comment.abuseFlaggedMessage": "Content reported for staff to review",
@@ -31,6 +33,7 @@
   "discussions.comment.comments.reason": "Reason",
   "discussions.post.closedBy": "Post closed by",
   "discussion.comment.repliesHeading": "{count} replies for the response added",
+  "discussion.comment.time": "{time} ago",
   "discussions.learner.reported": "{reported} reported",
   "discussions.learner.previouslyReported": "{previouslyReported} previously reported",
   "discussions.learner.lastLogin": "Last active {lastActiveTime}",
@@ -41,6 +44,7 @@
   "discussions.learner.reportedActivity": "Reported activity",
   "discussions.learner.sortFilterStatus": "All learners by {sort, select,\n      flagged {reported activity}\n      activity {most activity}\n    }",
   "discussions.actions.button.alt": "Actions menu",
+  "discussions.actions.back.alt": "Back",
   "discussions.actions.unpin": "Unpin",
   "discussions.actions.close": "Close",
   "discussions.actions.reopen": "Reopen",
@@ -61,11 +65,13 @@
   "discussions.empty.noTopicSelected": "No topic selected",
   "discussions.sidebar.noResultsFound": "No results found",
   "discussions.sidebar.removeKeywords": "Try searching different keywords or removing some filters",
+  "discussions.sidebar.removeKeywordsOnly": "Try searching different keywords",
   "discussions.sidebar.removeFilters": "Try removing some filters",
   "discussions.empty.iconAlt": "Empty",
   "discussions.authors.label.staff": "Staff",
   "discussions.authors.label.ta": "TA",
   "discussions.learner.loadMostPosts": "Load more posts",
+  "discussions.post.anonymous.author": "anonymous",
   "discussions.navigation.breadcrumbMenu.allTopics": "Topics",
   "discussions.navigation.breadcrumbMenu.showAll": "Show all",
   "discussions.navigation.navigationBar.allPosts": "All posts",
@@ -76,7 +82,8 @@
   "discussions.posts.actionBar.searchAllPosts": "Search all posts",
   "discussions.posts.actionBar.search": "{page, select,\n      topics {Find a topic}\n      posts {Search all posts}\n      learners {Search learner}\n      myPosts {Search all posts}\n    }",
   "discussions.actionBar.searchInfo": "Showing {count} results for \"{text}\"",
-  "discussions.actionBar.clearSearch": "Clear",
+  "discussions.actionBar.searchInfoSearching": "Searching...",
+  "discussions.actionBar.clearSearch": "Clear results",
   "discussion.posts.actionBar.add": "Add a post",
   "discussion.posts.actionBar.close": "Close",
   "discussions.post.editor.type": "Post type",