diff --git a/app/appearance/langs/ar_SA.json b/app/appearance/langs/ar_SA.json
index b42333e6a..1fc2a7f5f 100644
--- a/app/appearance/langs/ar_SA.json
+++ b/app/appearance/langs/ar_SA.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "طي الكل",
+  "expandSameLevelHeading": "توسيع العناوين من نفس المستوى",
+  "foldSameLevelHeading": "طي العناوين من نفس المستوى",
+  "expandChildHeading": "توسيع العناوين الفرعية",
+  "foldChildHeading": "طي العناوين الفرعية",
+  "addChildHeading": "إضافة عنوان فرعي",
+  "insertSameLevelHeadingBefore": "إدراج عنوان من نفس المستوى قبل",
+  "insertSameLevelHeadingAfter": "إدراج عنوان من نفس المستوى بعد",
+  "upgrade": "ترقية",
+  "downgrade": "خفض المستوى",
   "clipboardPermissionDenied": "تم رفض إذن الحافظة. يرجى السماح بالوصول إلى الحافظة من شريط عنوان المتصفح ثم المحاولة مرة أخرى.",
   "jumpTo": "انتقل إلى",
   "vacuumDataIndex": "تحسين الفهرس",
diff --git a/app/appearance/langs/de_DE.json b/app/appearance/langs/de_DE.json
index f1ce306a6..b8a40b9cb 100644
--- a/app/appearance/langs/de_DE.json
+++ b/app/appearance/langs/de_DE.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "Alle einklappen",
+  "expandSameLevelHeading": "Überschriften auf gleicher Ebene ausklappen",
+  "foldSameLevelHeading": "Überschriften auf gleicher Ebene einklappen",
+  "expandChildHeading": "Unterüberschriften ausklappen",
+  "foldChildHeading": "Unterüberschriften einklappen",
+  "addChildHeading": "Unterüberschrift hinzufügen",
+  "insertSameLevelHeadingBefore": "Überschrift auf gleicher Ebene davor einfügen",
+  "insertSameLevelHeadingAfter": "Überschrift auf gleicher Ebene danach einfügen",
+  "upgrade": "Aktualisieren",
+  "downgrade": "Herabstufen",
   "clipboardPermissionDenied": "Zwischenablage-Berechtigung verweigert. Bitte erlauben Sie den Zugriff auf die Zwischenablage in der Adressleiste des Browsers und versuchen Sie es erneut.",
   "jumpTo": "Springe zu",
   "vacuumDataIndex": "Index optimieren",
diff --git a/app/appearance/langs/en_US.json b/app/appearance/langs/en_US.json
index 65f4f9881..cda9576e2 100644
--- a/app/appearance/langs/en_US.json
+++ b/app/appearance/langs/en_US.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "Fold all",
+  "expandSameLevelHeading": "Expand same level heading",
+  "foldSameLevelHeading": "Fold same level heading",
+  "expandChildHeading": "Expand child heading",
+  "foldChildHeading": "Fold child heading",
+  "addChildHeading": "Add child heading",
+  "insertSameLevelHeadingBefore": "Insert same level heading before",
+  "insertSameLevelHeadingAfter": "Insert same level heading after",
+  "upgrade": "Upgrade",
+  "downgrade": "Downgrade",
   "clipboardPermissionDenied": "Clipboard permission denied. Please allow clipboard access in the browser address bar and try again.",
   "jumpTo": "Jump to",
   "vacuumDataIndex": "Optimize Index",
diff --git a/app/appearance/langs/es_ES.json b/app/appearance/langs/es_ES.json
index 8b29c6878..392ba51d1 100644
--- a/app/appearance/langs/es_ES.json
+++ b/app/appearance/langs/es_ES.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "Colapsar todo",
+  "expandSameLevelHeading": "Expandir títulos del mismo nivel",
+  "foldSameLevelHeading": "Colapsar títulos del mismo nivel",
+  "expandChildHeading": "Expandir subtítulos",
+  "foldChildHeading": "Colapsar subtítulos",
+  "addChildHeading": "Agregar subtítulo",
+  "insertSameLevelHeadingBefore": "Insertar título del mismo nivel antes",
+  "insertSameLevelHeadingAfter": "Insertar título del mismo nivel después",
+  "upgrade": "Actualizar",
+  "downgrade": "Degradar",
   "clipboardPermissionDenied": "Permiso del portapapeles denegado. Permite el acceso al portapapeles en la barra de direcciones del navegador y vuelve a intentarlo.",
   "jumpTo": "Ir a",
   "vacuumDataIndex": "Optimizar índice",
diff --git a/app/appearance/langs/fr_FR.json b/app/appearance/langs/fr_FR.json
index edf05b47d..3f934aebc 100644
--- a/app/appearance/langs/fr_FR.json
+++ b/app/appearance/langs/fr_FR.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "Tout replier",
+  "expandSameLevelHeading": "Développer les titres du même niveau",
+  "foldSameLevelHeading": "Replier les titres du même niveau",
+  "expandChildHeading": "Développer les sous-titres",
+  "foldChildHeading": "Replier les sous-titres",
+  "addChildHeading": "Ajouter un sous-titre",
+  "insertSameLevelHeadingBefore": "Insérer un titre du même niveau avant",
+  "insertSameLevelHeadingAfter": "Insérer un titre du même niveau après",
+  "upgrade": "Mettre à niveau",
+  "downgrade": "Rétrograder",
   "clipboardPermissionDenied": "Permission du presse-papiers refusée. Veuillez autoriser l'accès au presse-papiers dans la barre d'adresse du navigateur, puis réessayez.",
   "jumpTo": "Aller à",
   "vacuumDataIndex": "Optimiser l'index",
diff --git a/app/appearance/langs/he_IL.json b/app/appearance/langs/he_IL.json
index 491087d2d..25a366837 100644
--- a/app/appearance/langs/he_IL.json
+++ b/app/appearance/langs/he_IL.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "קפל הכל",
+  "expandSameLevelHeading": "הרחב כותרות באותו רמה",
+  "foldSameLevelHeading": "קפל כותרות באותו רמה",
+  "expandChildHeading": "הרחב כותרות משנה",
+  "foldChildHeading": "קפל כותרות משנה",
+  "addChildHeading": "הוסף כותרת משנה",
+  "insertSameLevelHeadingBefore": "הוסף כותרת באותו רמה לפני",
+  "insertSameLevelHeadingAfter": "הוסף כותרת באותו רמה אחרי",
+  "upgrade": "שדרג",
+  "downgrade": "הורד רמה",
   "clipboardPermissionDenied": "ההרשאה ללוח נדחתה. אפשר גישה ללוח משורת הכתובת בדפדפן ונסה שוב.",
   "jumpTo": "קפוץ אל",
   "vacuumDataIndex": "אופטימיזציית אינדקס",
diff --git a/app/appearance/langs/it_IT.json b/app/appearance/langs/it_IT.json
index de75f0fbd..6df0b31e1 100644
--- a/app/appearance/langs/it_IT.json
+++ b/app/appearance/langs/it_IT.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "Comprimi tutto",
+  "expandSameLevelHeading": "Espandi intestazioni dello stesso livello",
+  "foldSameLevelHeading": "Comprimi intestazioni dello stesso livello",
+  "expandChildHeading": "Espandi sottotitoli",
+  "foldChildHeading": "Comprimi sottotitoli",
+  "addChildHeading": "Aggiungi sottotitolo",
+  "insertSameLevelHeadingBefore": "Inserisci intestazione dello stesso livello prima",
+  "insertSameLevelHeadingAfter": "Inserisci intestazione dello stesso livello dopo",
+  "upgrade": "Aggiorna",
+  "downgrade": "Retrocedi",
   "clipboardPermissionDenied": "Autorizzazione agli appunti negata. Consenti l'accesso agli appunti dalla barra degli indirizzi del browser e riprova.",
   "jumpTo": "Vai a",
   "vacuumDataIndex": "Ottimizza indice",
diff --git a/app/appearance/langs/ja_JP.json b/app/appearance/langs/ja_JP.json
index c769e0128..0dbb3d96f 100644
--- a/app/appearance/langs/ja_JP.json
+++ b/app/appearance/langs/ja_JP.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "すべて折りたたむ",
+  "expandSameLevelHeading": "同じレベルの見出しを展開",
+  "foldSameLevelHeading": "同じレベルの見出しを折りたたむ",
+  "expandChildHeading": "子見出しを展開",
+  "foldChildHeading": "子見出しを折りたたむ",
+  "addChildHeading": "子見出しを追加",
+  "insertSameLevelHeadingBefore": "前に同じレベルの見出しを挿入",
+  "insertSameLevelHeadingAfter": "後に同じレベルの見出しを挿入",
+  "upgrade": "アップグレード",
+  "downgrade": "ダウングレード",
   "clipboardPermissionDenied": "クリップボードの権限が拒否されました。ブラウザのアドレスバーでクリップボードへのアクセスを許可してから再試行してください。",
   "jumpTo": "ジャンプ先",
   "vacuumDataIndex": "インデックスの最適化",
diff --git a/app/appearance/langs/pl_PL.json b/app/appearance/langs/pl_PL.json
index d01387837..1ca6619ca 100644
--- a/app/appearance/langs/pl_PL.json
+++ b/app/appearance/langs/pl_PL.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "Zwiń wszystko",
+  "expandSameLevelHeading": "Rozwiń nagłówki na tym samym poziomie",
+  "foldSameLevelHeading": "Zwiń nagłówki na tym samym poziomie",
+  "expandChildHeading": "Rozwiń nagłówki podrzędne",
+  "foldChildHeading": "Zwiń nagłówki podrzędne",
+  "addChildHeading": "Dodaj nagłówek podrzędny",
+  "insertSameLevelHeadingBefore": "Wstaw nagłówek na tym samym poziomie przed",
+  "insertSameLevelHeadingAfter": "Wstaw nagłówek na tym samym poziomie po",
+  "upgrade": "Aktualizuj",
+  "downgrade": "Degraduj",
   "clipboardPermissionDenied": "Odmowa dostępu do schowka. Zezwól na dostęp do schowka w pasku adresu przeglądarki, a następnie spróbuj ponownie.",
   "jumpTo": "Przejdź do",
   "vacuumDataIndex": "Optymalizuj indeks",
diff --git a/app/appearance/langs/pt_BR.json b/app/appearance/langs/pt_BR.json
index 7f2f8f53d..88f1ccdcf 100644
--- a/app/appearance/langs/pt_BR.json
+++ b/app/appearance/langs/pt_BR.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "Recolher tudo",
+  "expandSameLevelHeading": "Expandir títulos do mesmo nível",
+  "foldSameLevelHeading": "Recolher títulos do mesmo nível",
+  "expandChildHeading": "Expandir subtítulos",
+  "foldChildHeading": "Recolher subtítulos",
+  "addChildHeading": "Adicionar subtítulo",
+  "insertSameLevelHeadingBefore": "Inserir título do mesmo nível antes",
+  "insertSameLevelHeadingAfter": "Inserir título do mesmo nível depois",
+  "upgrade": "Atualizar",
+  "downgrade": "Rebaixar",
   "clipboardPermissionDenied": "Permissão da área de transferência negada. Permita o acesso à área de transferência na barra de endereço do navegador e tente novamente.",
   "jumpTo": "Ir para",
   "vacuumDataIndex": "Otimizar índice",
diff --git a/app/appearance/langs/ru_RU.json b/app/appearance/langs/ru_RU.json
index d8f8e276a..e814f8eaa 100644
--- a/app/appearance/langs/ru_RU.json
+++ b/app/appearance/langs/ru_RU.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "Свернуть всё",
+  "expandSameLevelHeading": "Развернуть заголовки того же уровня",
+  "foldSameLevelHeading": "Свернуть заголовки того же уровня",
+  "expandChildHeading": "Развернуть дочерние заголовки",
+  "foldChildHeading": "Свернуть дочерние заголовки",
+  "addChildHeading": "Добавить дочерний заголовок",
+  "insertSameLevelHeadingBefore": "Вставить заголовок того же уровня перед",
+  "insertSameLevelHeadingAfter": "Вставить заголовок того же уровня после",
+  "upgrade": "Обновить",
+  "downgrade": "Понизить",
   "clipboardPermissionDenied": "Доступ к буферу обмена отклонён. Разрешите доступ в адресной строке браузера и попробуйте снова.",
   "jumpTo": "Перейти к",
   "vacuumDataIndex": "Оптимизация индекса",
diff --git a/app/appearance/langs/zh_CHT.json b/app/appearance/langs/zh_CHT.json
index 480240d5a..a3f39faae 100644
--- a/app/appearance/langs/zh_CHT.json
+++ b/app/appearance/langs/zh_CHT.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "全部摺疊",
+  "expandSameLevelHeading": "展開同級標題",
+  "foldSameLevelHeading": "摺疊同級標題",
+  "expandChildHeading": "展開子標題",
+  "foldChildHeading": "摺疊子標題",
+  "addChildHeading": "新增子標題",
+  "insertSameLevelHeadingBefore": "在前方插入同級標題",
+  "insertSameLevelHeadingAfter": "在後方插入同級標題",
+  "upgrade": "升級",
+  "downgrade": "降級",
   "clipboardPermissionDenied": "剪貼簿權限被拒絕，請在瀏覽器地址欄允許訪問剪貼簿後再試",
   "jumpTo": "跳轉到",
   "vacuumDataIndex": "優化索引",
diff --git a/app/appearance/langs/zh_CN.json b/app/appearance/langs/zh_CN.json
index 1e0979367..1c4caf3f0 100644
--- a/app/appearance/langs/zh_CN.json
+++ b/app/appearance/langs/zh_CN.json
@@ -1,4 +1,14 @@
 {
+  "foldAll": "全部折叠",
+  "expandSameLevelHeading": "展开同级标题",
+  "foldSameLevelHeading": "折叠同级标题",
+  "expandChildHeading": "展开子标题",
+  "foldChildHeading": "折叠子标题",
+  "addChildHeading": "添加子标题",
+  "insertSameLevelHeadingBefore": "在前方插入同级标题",
+  "insertSameLevelHeadingAfter": "在后方插入同级标题",
+  "upgrade": "升级",
+  "downgrade": "降级",
   "clipboardPermissionDenied": "剪贴板权限被拒绝，请在浏览器地址栏允许访问剪贴板后再试",
   "jumpTo": "跳转到",
   "vacuumDataIndex": "优化索引",