diff --git a/l10n/ast/viewer.properties b/l10n/ast/viewer.properties
index daa5cbf0c..2346c54ba 100644
--- a/l10n/ast/viewer.properties
+++ b/l10n/ast/viewer.properties
@@ -108,3 +108,4 @@ document_properties.title = Propiedaes del documentu…
 attachments_label = Axuntos
 attachments.title = Amosar axuntos
 unexpected_response_error = Rempuesta inesperada del sirvidor.
+page_scale_percent = {{scale}}%
diff --git a/l10n/bg/chrome.properties b/l10n/bg/chrome.properties
index 6bae55010..7c743b153 100644
--- a/l10n/bg/chrome.properties
+++ b/l10n/bg/chrome.properties
@@ -15,5 +15,5 @@
 # Chrome notification bar messages and buttons
 unsupported_feature=Този PDF може и да не се покаже правилно.
 unsupported_feature_forms=Този документ PDF съдържа формуляри. Попълването на полета на формуляри не се поддържа.
-open_with_different_viewer=Отваряне с различна програма за показване
+open_with_different_viewer=Отваряне с друга програма
 open_with_different_viewer.accessKey=О
diff --git a/l10n/bg/viewer.properties b/l10n/bg/viewer.properties
index fd102d9a2..80059f562 100644
--- a/l10n/bg/viewer.properties
+++ b/l10n/bg/viewer.properties
@@ -164,4 +164,4 @@ password_cancel=Отказ
 printing_not_supported=Внимание: Този браузър няма пълна поддръжка на отпечатване.
 printing_not_ready=Внимание: Този PDF файл не е напълно зареден за печат.
 web_fonts_disabled=Уеб-шрифтовете са забранени: разрешаване на използването на вградените PDF шрифтове.
-document_colors_disabled=На PDF-документите не е разрешено да използват собствени цветове: „Разрешаване на страниците да избират собствени цветове“ е деактивирано в браузъра.
+document_colors_disabled=На PDF-документите не е разрешено да използват собствени цветове: „Разрешаване на страниците да избират собствени цветове“ е изключено в браузъра.
diff --git a/l10n/ja/viewer.properties b/l10n/ja/viewer.properties
index 04a6a0b3f..10a21d941 100644
--- a/l10n/ja/viewer.properties
+++ b/l10n/ja/viewer.properties
@@ -13,9 +13,9 @@
 # limitations under the License.
 
 # Main toolbar buttons (tooltips and alt text for images)
-previous.title=前のページ
+previous.title=前のページへ戻ります
 previous_label=前へ
-next.title=次のページ
+next.title=次のページへ進みます
 next_label=次へ
 
 # LOCALIZATION NOTE (page_label, page_of):
@@ -25,41 +25,41 @@ next_label=次へ
 page_label=ページ:
 page_of=/ {{pageCount}}
 
-zoom_out.title=縮小
+zoom_out.title=表示を縮小します
 zoom_out_label=縮小
-zoom_in.title=拡大
+zoom_in.title=表示を拡大します
 zoom_in_label=拡大
 zoom.title=拡大/縮小
 presentation_mode.title=プレゼンテーションモードに切り替えます
 presentation_mode_label=プレゼンテーションモード
-open_file.title=ファイルを開く
+open_file.title=ファイルを指定して開きます
 open_file_label=開く
-print.title=印刷
+print.title=印刷します
 print_label=印刷
-download.title=ダウンロード
+download.title=ダウンロードします
 download_label=ダウンロード
-bookmark.title=現在のビューをブックマーク
-bookmark_label=現在のビューをブックマーク
+bookmark.title=現在のビューの URL です (コピーまたは新しいウィンドウに開く)
+bookmark_label=現在のビュー
 
 # Secondary toolbar and context menu
 tools.title=ツール
 tools_label=ツール
-first_page.title=最初のページへ移動
+first_page.title=最初のページへ移動します
 first_page.label=最初のページへ移動
 first_page_label=最初のページへ移動
-last_page.title=最後のページへ移動
+last_page.title=最後のページへ移動します
 last_page.label=最後のページへ移動
 last_page_label=最後のページへ移動
-page_rotate_cw.title=右回転
+page_rotate_cw.title=ページを右へ回転します
 page_rotate_cw.label=右回転
 page_rotate_cw_label=右回転
-page_rotate_ccw.title=左回転
+page_rotate_ccw.title=ページを左へ回転します
 page_rotate_ccw.label=左回転
 page_rotate_ccw_label=左回転
 
-hand_tool_enable.title=手のひらツールを有効にする
+hand_tool_enable.title=手のひらツールを有効にします
 hand_tool_enable_label=手のひらツールを有効にする
-hand_tool_disable.title=手のひらツールを無効にする
+hand_tool_disable.title=手のひらツールを無効にします
 hand_tool_disable_label=手のひらツールを無効にする
 
 # Document properties dialog box
@@ -77,7 +77,7 @@ document_properties_creation_date=作成日:
 document_properties_modification_date=更新日:
 document_properties_date_string={{date}}, {{time}}
 document_properties_creator=アプリケーション:
-document_properties_producer=PDF 変換:
+document_properties_producer=PDF 作成:
 document_properties_version=PDF のバージョン:
 document_properties_page_count=ページ数:
 document_properties_close=閉じる
@@ -85,15 +85,15 @@ document_properties_close=閉じる
 # Tooltips and alt text for side panel toolbar buttons
 # (the _label strings are alt text for the buttons, the .title strings are
 # tooltips)
-toggle_sidebar.title=サイドバーの切り替え
+toggle_sidebar.title=サイドバー表示を切り替えます
 toggle_sidebar_label=サイドバーの切り替え
-outline.title=文書の目次
+outline.title=文書の目次を表示します
 outline_label=文書の目次
-attachments.title=添付ファイル
+attachments.title=添付ファイルを表示します
 attachments_label=添付ファイル
-thumbs.title=縮小版
+thumbs.title=縮小版を表示します
 thumbs_label=縮小版
-findbar.title=検索
+findbar.title=文書内を検索します
 findbar_label=検索
 
 # Thumbnails panel item (tooltip and alt text for images)
diff --git a/l10n/ml/viewer.properties b/l10n/ml/viewer.properties
index 37630b611..1e17a8a84 100644
--- a/l10n/ml/viewer.properties
+++ b/l10n/ml/viewer.properties
@@ -142,12 +142,14 @@ page_scale_auto=സ്വയമായി വലുതാക്കുക
 page_scale_actual=യഥാര്‍ത്ഥ വ്യാപ്തി
 # LOCALIZATION NOTE (page_scale_percent): "{{scale}}" will be replaced by a
 # numerical scale value.
+page_scale_percent={{scale}}%
 
 # Loading indicator messages
 loading_error_indicator=പിശക്
 loading_error=പിഡിഎഫ് ലഭ്യമാക്കുമ്പോള്‍ പിശക് ഉണ്ടായിരിയ്ക്കുന്നു.
 invalid_file_error=തെറ്റായ അല്ലെങ്കില്‍ തകരാറുള്ള പിഡിഎഫ് ഫയല്‍.
 missing_file_error=പിഡിഎഫ് ഫയല്‍ ലഭ്യമല്ല.
+unexpected_response_error=പ്രതീക്ഷിക്കാത്ത സെര്‍വര്‍ മറുപടി.
 
 # LOCALIZATION NOTE (text_annotation_type.alt): This is used as a tooltip.
 # "{{type}}" will be replaced with an annotation type from a list defined in
diff --git a/l10n/pt-PT/chrome.properties b/l10n/pt-PT/chrome.properties
index d9cf0e9db..62d9313ff 100644
--- a/l10n/pt-PT/chrome.properties
+++ b/l10n/pt-PT/chrome.properties
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 # Chrome notification bar messages and buttons
-unsupported_feature=Este documento PDF poderá não ser apresentado corretamente.
+unsupported_feature=Este documento PDF poderá não ser mostrado corretamente.
 unsupported_feature_forms=Este documento PDF contém formulários. O preenchimento dos campos não é suportado.
 open_with_different_viewer=Abrir com outro visualizador
 open_with_different_viewer.accessKey=o
diff --git a/l10n/pt-PT/viewer.properties b/l10n/pt-PT/viewer.properties
index 7a83edfac..e839d5e71 100644
--- a/l10n/pt-PT/viewer.properties
+++ b/l10n/pt-PT/viewer.properties
@@ -156,8 +156,8 @@ unexpected_response_error=Resposta inesperada do servidor.
 # the PDF spec (32000-1:2008 Table 169 – Annotation types).
 # Some common types are e.g.: "Check", "Text", "Comment", "Note"
 text_annotation_type.alt=[Anotação {{type}}]
-password_label=Introduza a senha para abrir este PDF.
-password_invalid=Senha inválida. Tente novamente.
+password_label=Introduza a palavra-passe para abrir este PDF.
+password_invalid=Palavra-passe inválida. Tente novamente.
 password_ok=OK
 password_cancel=Cancelar
 
diff --git a/l10n/son/viewer.properties b/l10n/son/viewer.properties
index 23f23bfb5..83e48dc8c 100644
--- a/l10n/son/viewer.properties
+++ b/l10n/son/viewer.properties
@@ -68,7 +68,7 @@ document_properties_label=Takadda mayrawey…
 document_properties_file_name=Tuku maa:
 document_properties_file_size=Tuku adadu:
 document_properties_kb=KB {{size_kb}} (cebsu-ize {{size_b}})
-document_properties_mb=MB {{size_kb}} (cebsu-ize {{size_b}})
+document_properties_mb=MB {{size_mb}} (cebsu-ize {{size_b}})
 document_properties_title=Tiiramaa:
 document_properties_author=Hantumkaw:
 document_properties_subject=Dalil:
diff --git a/l10n/tn/viewer.properties b/l10n/tn/viewer.properties
index 805a688c0..57f06a849 100644
--- a/l10n/tn/viewer.properties
+++ b/l10n/tn/viewer.properties
@@ -59,6 +59,8 @@ error_more_info=Tshedimosetso e Nngwe
 # LOCALIZATION NOTE (error_line): "{{line}}" will be replaced with a line number
 
 # Predefined zoom values
+# LOCALIZATION NOTE (page_scale_percent): "{{scale}}" will be replaced by a
+# numerical scale value.
 
 # Loading indicator messages
 loading_error_indicator=Phoso
diff --git a/l10n/vi/viewer.properties b/l10n/vi/viewer.properties
index 15acc8efa..0c2a58d6f 100644
--- a/l10n/vi/viewer.properties
+++ b/l10n/vi/viewer.properties
@@ -120,6 +120,8 @@ page_scale_width=Chiều rộng trang
 page_scale_fit=Độ vừa của trang
 page_scale_auto=Tự động thu/phóng
 page_scale_actual=Kích thước thực
+# LOCALIZATION NOTE (page_scale_percent): "{{scale}}" will be replaced by a
+# numerical scale value.
 
 # Loading indicator messages
 loading_error_indicator=Lỗi