diff --git a/web/src/locales/ar.json b/web/src/locales/ar.json
index e12d725..b5dd58f 100644
--- a/web/src/locales/ar.json
+++ b/web/src/locales/ar.json
@@ -183,7 +183,7 @@
     "imapPort": "منفذ IMAP",
     "imapPortPlaceholder": "مثال: 993",
     "imapProxy": "استخدم وكيل SOCKS5 لاتصالات IMAP.",
-    "incSync": "مزامنة تزايدية",
+    "incDownload": "الفاصل",
     "lastSync": "آخر مزامنة",
     "leaveEmptyToKeepExisting": "اترك فارغًا للاحتفاظ بكلمة المرور الحالية، أو أدخل كلمة مرور جديدة لتحديثها.",
     "leaveEmptyToKeepPassword": "اترك فارغًا للاحتفاظ بكلمة المرور الحالية",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "لم يتم العثور على وسوم",
     "search_placeholder": "بحث عن الوسوم..."
   },
+  "theme": {
+    "appearance": "الإعدادات المظهر",
+    "blue": "أزرق",
+    "dark": "داكن",
+    "default": "افتراضي",
+    "green": "أخضر",
+    "light": "فاتح",
+    "orange": "برتقالي",
+    "rose": "وردي",
+    "yellow": "أصفر"
+  },
   "time": {
     "absolute_range": "نطاق تاريخ محدد",
     "apply": "تطبيق",
diff --git a/web/src/locales/da.json b/web/src/locales/da.json
index be1d701..394e8b3 100644
--- a/web/src/locales/da.json
+++ b/web/src/locales/da.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP-port",
     "imapPortPlaceholder": "f.eks. 993",
     "imapProxy": "Brug en SOCKS5-proxy til IMAP-forbindelser.",
-    "incSync": "Ink. Synk.",
+    "incDownload": "Interval",
     "lastSync": "Sidste synk.",
     "leaveEmptyToKeepExisting": "Lad stå tomt for at beholde den eksisterende adgangskode, eller indtast en ny for at opdatere den.",
     "leaveEmptyToKeepPassword": "Lad stå tomt for at beholde nuværende adgangskode",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Ingen tags fundet",
     "search_placeholder": "Søg tags..."
   },
+  "theme": {
+    "appearance": "Udseende",
+    "blue": "Blå",
+    "dark": "Mørk",
+    "default": "Standard",
+    "green": "Grøn",
+    "light": "Lys",
+    "orange": "Orange",
+    "rose": "Rosa",
+    "yellow": "Gul"
+  },
   "time": {
     "absolute_range": "Absolut datointerval",
     "apply": "Anvend",
diff --git a/web/src/locales/de.json b/web/src/locales/de.json
index e0b9190..54f82d0 100644
--- a/web/src/locales/de.json
+++ b/web/src/locales/de.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP-Port",
     "imapPortPlaceholder": "z.B. 993",
     "imapProxy": "SOCKS5-Proxy für IMAP-Verbindungen verwenden.",
-    "incSync": "Inkrementelle Synchr.",
+    "incDownload": "Intervall",
     "lastSync": "Letzte Synchronisierung",
     "leaveEmptyToKeepExisting": "Leer lassen, um das bestehende Passwort beizubehalten, oder einen neuen Wert eingeben, um es zu aktualisieren.",
     "leaveEmptyToKeepPassword": "Leer lassen, um das aktuelle Passwort beizubehalten",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Keine Tags gefunden",
     "search_placeholder": "Tags suchen..."
   },
+  "theme": {
+    "appearance": "Erscheinungsbild",
+    "blue": "Blau",
+    "dark": "Dunkel",
+    "default": "Standard",
+    "green": "Grün",
+    "light": "Hell",
+    "orange": "Orange",
+    "rose": "Rosa",
+    "yellow": "Gelb"
+  },
   "time": {
     "absolute_range": "Absoluter Datumsbereich",
     "apply": "Anwenden",
diff --git a/web/src/locales/en.json b/web/src/locales/en.json
index d3019f1..b11635b 100644
--- a/web/src/locales/en.json
+++ b/web/src/locales/en.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP Port",
     "imapPortPlaceholder": "e.g 993",
     "imapProxy": "Use a SOCKS5 proxy for IMAP connections.",
-    "incSync": "Inc Sync",
+    "incDownload": "Interval",
     "lastSync": "Last Sync",
     "leaveEmptyToKeepExisting": "Leave empty to keep the existing password, or enter a new password to update it.",
     "leaveEmptyToKeepPassword": "Leave empty to keep current password",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "No tags found",
     "search_placeholder": "Search tags..."
   },
+  "theme": {
+    "appearance": "Appearance",
+    "blue": "Blue",
+    "dark": "Dark",
+    "default": "Default",
+    "green": "Green",
+    "light": "Light",
+    "orange": "Orange",
+    "rose": "Rose",
+    "yellow": "Yellow"
+  },
   "time": {
     "absolute_range": "Absolute date range",
     "apply": "Apply",
diff --git a/web/src/locales/es.json b/web/src/locales/es.json
index 2688c40..e7a15e8 100644
--- a/web/src/locales/es.json
+++ b/web/src/locales/es.json
@@ -183,7 +183,7 @@
     "imapPort": "Puerto IMAP",
     "imapPortPlaceholder": "ej. 993",
     "imapProxy": "Usar proxy SOCKS5 para conexiones IMAP.",
-    "incSync": "Sinc. Increm.",
+    "incDownload": "Intervalo",
     "lastSync": "Última sincronización",
     "leaveEmptyToKeepExisting": "Deja vacío para mantener la contraseña existente, o introduce un nuevo valor para actualizarla.",
     "leaveEmptyToKeepPassword": "Deja vacío para mantener la contraseña actual",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "No se encontraron etiquetas",
     "search_placeholder": "Buscar etiquetas..."
   },
+  "theme": {
+    "appearance": "Apariencia",
+    "blue": "Azul",
+    "dark": "Oscuro",
+    "default": "Predeterminado",
+    "green": "Verde",
+    "light": "Claro",
+    "orange": "Naranja",
+    "rose": "Rosa",
+    "yellow": "Amarillo"
+  },
   "time": {
     "absolute_range": "Rango de fechas absoluto",
     "apply": "Aplicar",
diff --git a/web/src/locales/fi.json b/web/src/locales/fi.json
index 14bd36d..a2a37a0 100644
--- a/web/src/locales/fi.json
+++ b/web/src/locales/fi.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP-portti",
     "imapPortPlaceholder": "esim. 993",
     "imapProxy": "Käytä SOCKS5-välityspalvelinta IMAP-yhteyksiin.",
-    "incSync": "Lisäsynkronointi",
+    "incDownload": "Väli",
     "lastSync": "Viimeisin synkronointi",
     "leaveEmptyToKeepExisting": "Jätä tyhjäksi säilyttääksesi olemassa olevan salasanan, tai syötä uusi päivittääksesi sen.",
     "leaveEmptyToKeepPassword": "Jätä tyhjäksi säilyttääksesi nykyisen salasanan",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Tunnisteita ei löytynyt",
     "search_placeholder": "Hae tunnisteita..."
   },
+  "theme": {
+    "appearance": "Ulkoasu",
+    "blue": "Sininen",
+    "dark": "Tumma",
+    "default": "Oletus",
+    "green": "Vihreä",
+    "light": "Vaalea",
+    "orange": "Oranssi",
+    "rose": "Roosa",
+    "yellow": "Keltainen"
+  },
   "time": {
     "absolute_range": "Kiinteä päivämääräväli",
     "apply": "Käytä",
diff --git a/web/src/locales/fr.json b/web/src/locales/fr.json
index 32e9a47..c55df2d 100644
--- a/web/src/locales/fr.json
+++ b/web/src/locales/fr.json
@@ -183,7 +183,7 @@
     "imapPort": "Port IMAP",
     "imapPortPlaceholder": "ex. 993",
     "imapProxy": "Utiliser un proxy SOCKS5 pour les connexions IMAP.",
-    "incSync": "Sync. Inc.",
+    "incDownload": "Intervalle",
     "lastSync": "Dernière Synchronisation",
     "leaveEmptyToKeepExisting": "Laissez vide pour conserver le mot de passe existant, ou entrez-en un nouveau pour le mettre à jour.",
     "leaveEmptyToKeepPassword": "Laisser vide pour conserver le mot de passe actuel",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Aucune étiquette trouvée",
     "search_placeholder": "Rechercher des étiquettes..."
   },
+  "theme": {
+    "appearance": "Apparence",
+    "blue": "Bleu",
+    "dark": "Sombre",
+    "default": "Par défaut",
+    "green": "Vert",
+    "light": "Clair",
+    "orange": "Orange",
+    "rose": "Rose",
+    "yellow": "Jaune"
+  },
   "time": {
     "absolute_range": "Plage de dates absolue",
     "apply": "Appliquer",
diff --git a/web/src/locales/it.json b/web/src/locales/it.json
index 450c959..6848536 100644
--- a/web/src/locales/it.json
+++ b/web/src/locales/it.json
@@ -183,7 +183,7 @@
     "imapPort": "Porta IMAP",
     "imapPortPlaceholder": "es. 993",
     "imapProxy": "Usa un proxy SOCKS5 per le connessioni IMAP.",
-    "incSync": "Sync Inc.",
+    "incDownload": "Intervallo",
     "lastSync": "Ultima Sincronizzazione",
     "leaveEmptyToKeepExisting": "Lascia vuoto per mantenere la password esistente, o inseriscine una nuova per aggiornarla.",
     "leaveEmptyToKeepPassword": "Lascia vuoto per mantenere la password attuale",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Nessun tag trovato",
     "search_placeholder": "Cerca tag..."
   },
+  "theme": {
+    "appearance": "Aspetto",
+    "blue": "Blu",
+    "dark": "Scuro",
+    "default": "Predefinito",
+    "green": "Verde",
+    "light": "Chiaro",
+    "orange": "Arancione",
+    "rose": "Rosa",
+    "yellow": "Giallo"
+  },
   "time": {
     "absolute_range": "Intervallo di date assoluto",
     "apply": "Applica",
diff --git a/web/src/locales/jp.json b/web/src/locales/jp.json
index 9bfb07d..04d4727 100644
--- a/web/src/locales/jp.json
+++ b/web/src/locales/jp.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAPポート",
     "imapPortPlaceholder": "例: 993",
     "imapProxy": "IMAP接続にSOCKS5プロキシを使用します。",
-    "incSync": "増分同期",
+    "incDownload": "間隔",
     "lastSync": "最終同期",
     "leaveEmptyToKeepExisting": "既存のパスワードを保持する場合は空欄にしてください。更新する場合は新しいパスワードを入力してください。",
     "leaveEmptyToKeepPassword": "現在のパスワードを保持する場合は空欄にしてください",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "タグが見つかりません",
     "search_placeholder": "タグを検索..."
   },
+  "theme": {
+    "appearance": "外観設定",
+    "blue": "ブルー",
+    "dark": "ダーク",
+    "default": "デフォルト",
+    "green": "グリーン",
+    "light": "ライト",
+    "orange": "オレンジ",
+    "rose": "ローズ",
+    "yellow": "イエロー"
+  },
   "time": {
     "absolute_range": "絶対日付範囲",
     "apply": "適用",
diff --git a/web/src/locales/ko.json b/web/src/locales/ko.json
index 23ce3ee..767503e 100644
--- a/web/src/locales/ko.json
+++ b/web/src/locales/ko.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP 포트",
     "imapPortPlaceholder": "예: 993",
     "imapProxy": "IMAP 연결에 SOCKS5 프록시를 사용합니다.",
-    "incSync": "증분 동기화",
+    "incDownload": "간격",
     "lastSync": "최종 동기화",
     "leaveEmptyToKeepExisting": "기존 비밀번호를 유지하려면 비워 두십시오. 업데이트할 경우에만 새 비밀번호를 입력하십시오.",
     "leaveEmptyToKeepPassword": "현재 비밀번호를 유지하려면 비워 두십시오",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "태그를 찾을 수 없습니다",
     "search_placeholder": "태그 검색..."
   },
+  "theme": {
+    "appearance": "모양 설정",
+    "blue": "블루",
+    "dark": "다크",
+    "default": "기본",
+    "green": "그린",
+    "light": "라이트",
+    "orange": "오렌지",
+    "rose": "로즈",
+    "yellow": "옐로우"
+  },
   "time": {
     "absolute_range": "절대 날짜 범위",
     "apply": "적용",
diff --git a/web/src/locales/nl.json b/web/src/locales/nl.json
index 66140cc..4c45601 100644
--- a/web/src/locales/nl.json
+++ b/web/src/locales/nl.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP Poort",
     "imapPortPlaceholder": "bv. 993",
     "imapProxy": "Gebruik een SOCKS5-proxy voor IMAP-verbindingen.",
-    "incSync": "Inc Sync",
+    "incDownload": "Interval",
     "lastSync": "Laatste Sync",
     "leaveEmptyToKeepExisting": "Laat leeg om het bestaande wachtwoord te behouden, of voer een nieuw wachtwoord in om het bij te werken.",
     "leaveEmptyToKeepPassword": "Laat leeg om huidig wachtwoord te behouden",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Geen tags gevonden",
     "search_placeholder": "Tags zoeken..."
   },
+  "theme": {
+    "appearance": "Uiterlijk",
+    "blue": "Blauw",
+    "dark": "Donker",
+    "default": "Standaard",
+    "green": "Groen",
+    "light": "Licht",
+    "orange": "Oranje",
+    "rose": "Roze",
+    "yellow": "Geel"
+  },
   "time": {
     "absolute_range": "Absolute datumbereik",
     "apply": "Toepassen",
diff --git a/web/src/locales/no.json b/web/src/locales/no.json
index f22a1ee..b53094c 100644
--- a/web/src/locales/no.json
+++ b/web/src/locales/no.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP-port",
     "imapPortPlaceholder": "f.eks. 993",
     "imapProxy": "Bruk en SOCKS5-proxy for IMAP-tilkoblinger.",
-    "incSync": "Ink. synk",
+    "incDownload": "Intervall",
     "lastSync": "Siste synkronisering",
     "leaveEmptyToKeepExisting": "La stå tomt for å beholde det eksisterende passordet, eller skriv inn et nytt passord for å oppdatere det.",
     "leaveEmptyToKeepPassword": "La stå tomt for å beholde nåværende passord",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Ingen etiketter funnet",
     "search_placeholder": "Søk etter etiketter..."
   },
+  "theme": {
+    "appearance": "Utseende",
+    "blue": "Blå",
+    "dark": "Mørk",
+    "default": "Standard",
+    "green": "Grønn",
+    "light": "Lys",
+    "orange": "Oransje",
+    "rose": "Rosa",
+    "yellow": "Gul"
+  },
   "time": {
     "absolute_range": "Absolutt datointervall",
     "apply": "Bruk",
diff --git a/web/src/locales/pl.json b/web/src/locales/pl.json
index afe7bbb..c2f93e8 100644
--- a/web/src/locales/pl.json
+++ b/web/src/locales/pl.json
@@ -183,7 +183,7 @@
     "imapPort": "Port IMAP",
     "imapPortPlaceholder": "np. 993 (szyfrowany TLS/SSL) lub 143 (bez szyfrowania)",
     "imapProxy": "Użyj proxy gniazda SOCKS5 dla połączeń IMAP.",
-    "incSync": "Inc Sync",
+    "incDownload": "Interwał",
     "lastSync": "OStatnia synchronizacja",
     "leaveEmptyToKeepExisting": "Pozostaw to pole puste, jeśli chcesz zachować dotychczasowe hasło lub wpisz nowe, aby zaktualizować.",
     "leaveEmptyToKeepPassword": "Pozostaw to pole puste, jeśli chcesz zachować dotychczasowe hasło",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Nie znaleziono tagów",
     "search_placeholder": "Szukaj tagów..."
   },
+  "theme": {
+    "appearance": "Wygląd",
+    "blue": "Niebieski",
+    "dark": "Ciemny",
+    "default": "Domyślny",
+    "green": "Zielony",
+    "light": "Jasny",
+    "orange": "Pomarańczowy",
+    "rose": "Różany",
+    "yellow": "Żółty"
+  },
   "time": {
     "absolute_range": "Bezwzględny zakres dat",
     "apply": "Zastosuj",
diff --git a/web/src/locales/pt.json b/web/src/locales/pt.json
index aeed73e..081fb73 100644
--- a/web/src/locales/pt.json
+++ b/web/src/locales/pt.json
@@ -183,7 +183,7 @@
     "imapPort": "Porta IMAP",
     "imapPortPlaceholder": "Ex: 993",
     "imapProxy": "Usar proxy SOCKS5 para conexão IMAP.",
-    "incSync": "Sincronização Incremental",
+    "incDownload": "Intervalo",
     "lastSync": "Última Sincronização",
     "leaveEmptyToKeepExisting": "Deixe vazio para manter a senha existente. Insira a nova senha apenas se estiver atualizando.",
     "leaveEmptyToKeepPassword": "Deixe vazio para manter a senha atual",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Nenhuma etiqueta encontrada",
     "search_placeholder": "Pesquisar etiquetas..."
   },
+  "theme": {
+    "appearance": "Aparência",
+    "blue": "Azul",
+    "dark": "Escuro",
+    "default": "Padrão",
+    "green": "Verde",
+    "light": "Claro",
+    "orange": "Laranja",
+    "rose": "Rosa",
+    "yellow": "Amarelo"
+  },
   "time": {
     "absolute_range": "Intervalo de datas absoluto",
     "apply": "Aplicar",
diff --git a/web/src/locales/ru.json b/web/src/locales/ru.json
index 4051946..692495e 100644
--- a/web/src/locales/ru.json
+++ b/web/src/locales/ru.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP Порт",
     "imapPortPlaceholder": "например, 993",
     "imapProxy": "Использовать SOCKS5 прокси для соединений IMAP.",
-    "incSync": "Инкр. синхр.",
+    "incDownload": "Интервал",
     "lastSync": "Посл. синхр.",
     "leaveEmptyToKeepExisting": "Оставьте пустым, чтобы сохранить существующий пароль, или введите новый для обновления.",
     "leaveEmptyToKeepPassword": "Оставьте пустым, чтобы сохранить текущий пароль",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Теги не найдены",
     "search_placeholder": "Поиск тегов..."
   },
+  "theme": {
+    "appearance": "Внешний вид",
+    "blue": "Синий",
+    "dark": "Темная",
+    "default": "По умолчанию",
+    "green": "Зеленый",
+    "light": "Светлая",
+    "orange": "Оранжевый",
+    "rose": "Розовый",
+    "yellow": "Желтый"
+  },
   "time": {
     "absolute_range": "Абсолютный диапазон дат",
     "apply": "Применить",
diff --git a/web/src/locales/sv.json b/web/src/locales/sv.json
index 72c9255..2b0f2a1 100644
--- a/web/src/locales/sv.json
+++ b/web/src/locales/sv.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP-port",
     "imapPortPlaceholder": "t.ex. 993",
     "imapProxy": "Använd en SOCKS5-proxy för IMAP-anslutningar.",
-    "incSync": "Ink. synk",
+    "incDownload": "Intervall",
     "lastSync": "Senaste synk",
     "leaveEmptyToKeepExisting": "Lämna tomt för att behålla det befintliga lösenordet, eller ange ett nytt för att uppdatera det.",
     "leaveEmptyToKeepPassword": "Lämna tomt för att behålla nuvarande lösenord",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "Inga taggar hittades",
     "search_placeholder": "Sök taggar..."
   },
+  "theme": {
+    "appearance": "Utseende",
+    "blue": "Blå",
+    "dark": "Mörk",
+    "default": "Standard",
+    "green": "Grön",
+    "light": "Ljus",
+    "orange": "Orange",
+    "rose": "Rosa",
+    "yellow": "Gul"
+  },
   "time": {
     "absolute_range": "Absolut datumintervall",
     "apply": "Använd",
diff --git a/web/src/locales/zh-tw.json b/web/src/locales/zh-tw.json
index 977cf92..5890668 100644
--- a/web/src/locales/zh-tw.json
+++ b/web/src/locales/zh-tw.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP 連接埠",
     "imapPortPlaceholder": "例如：993",
     "imapProxy": "使用 SOCKS5 代理進行 IMAP 連線。",
-    "incSync": "增量同步",
+    "incDownload": "間隔",
     "lastSync": "上次同步",
     "leaveEmptyToKeepExisting": "保留現有密碼請留空。若要更新，請輸入新密碼。",
     "leaveEmptyToKeepPassword": "保留現有密碼請留空",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "未找到標籤",
     "search_placeholder": "搜尋標籤…"
   },
+  "theme": {
+    "appearance": "外觀設置",
+    "blue": "藍色",
+    "dark": "深色",
+    "default": "預設",
+    "green": "綠色",
+    "light": "淺色",
+    "orange": "橙色",
+    "rose": "玫瑰色",
+    "yellow": "黃色"
+  },
   "time": {
     "absolute_range": "絕對日期範圍",
     "apply": "套用",
diff --git a/web/src/locales/zh.json b/web/src/locales/zh.json
index efd1a5b..1dc6529 100644
--- a/web/src/locales/zh.json
+++ b/web/src/locales/zh.json
@@ -183,7 +183,7 @@
     "imapPort": "IMAP 端口",
     "imapPortPlaceholder": "例如:993",
     "imapProxy": "为 IMAP 连接使用 SOCKS5 代理。",
-    "incSync": "增量同步",
+    "incDownload": "间隔",
     "lastSync": "最后同步",
     "leaveEmptyToKeepExisting": "留空以保持现有密码，或输入新密码进行更新。",
     "leaveEmptyToKeepPassword": "留空以保持当前密码",
@@ -1373,6 +1373,17 @@
     "no_tags_found": "未找到标签",
     "search_placeholder": "搜索标签..."
   },
+  "theme": {
+    "appearance": "外观设置",
+    "blue": "蓝色",
+    "dark": "深色",
+    "default": "默认",
+    "green": "绿色",
+    "light": "浅色",
+    "orange": "橙色",
+    "rose": "玫瑰色",
+    "yellow": "黄色"
+  },
   "time": {
     "absolute_range": "绝对日期范围",
     "apply": "应用",