diff --git a/_locales/ca/messages.json b/_locales/ca/messages.json
index e99d7b8..30e6160 100644
--- a/_locales/ca/messages.json
+++ b/_locales/ca/messages.json
@@ -61,6 +61,38 @@
 		"message": "Desar",
 		"description": "Save button in the settings app"
 	},
+	"options_addlanguage": {
+		"message": "Afegir idioma",
+		"description": "Title for the 'Add language' dialog"
+	},
+	"options_addlanguage_addbutton": {
+		"message": "Afegeix",
+		"description": "Add button in the footer of the languages list"
+	},
+	"options_language_label": {
+		"message": "Idioma:",
+		"description": "Label for the language selector in the 'Add language' dialog"
+	},
+	"options_credits" : {
+		"message": "Crèdits",
+		"description": "Title for the credits link and dialog"
+	},
+	"options_credits_homepage": {
+		"message": "pàgina web",
+		"description": "Homepage link for an item in the credits. NOTE: put in in lowercase letters"
+	},
+	"options_credits_by": {
+		"message": "",
+		"description": "Fragment of the author statement in an item of the credits. NOTE: put in in lowercase letters. EXAMPLE: '{{options_credits_by}} Adrià Vilanova Martínez'"
+	},
+	"options_ok": {
+		"message": "OK",
+		"description": "OK button in the dialogs"
+	},
+	"options_cancel": {
+		"message": "Cancel·lar",
+		"description": "Cancel button in the dialogs"
+	},
 	"notification_install_title": { "message": "Gràcies per instal·lar 'Traduïr Text Seleccionat'" },
 	"notification_install_message": { "message": "Fes clic en aquesta notificació per a configurar l'extensión." },
 	"notification_upgradedtostorage_title": { "message": "'Traduïr Text Seleccionat' s'ha actualizat a v0.6!" },
diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index fd9fb40..8e36f91 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -15,7 +15,7 @@
 		"message": "Translate selection into...",
 		"description": "Title of the context menu that appears when a right click is done. Inside this parent menu there are the menus"
 	},
-	"contextmenu_title2" : {
+	"contextmenu_title2": {
 		"message": "Translate selection into '$language$'",
 		"description": "Title of the context menu that appears when a right click is done and there's only one language available.",
 		"placeholders": {
@@ -61,6 +61,38 @@
 		"message": "Save",
 		"description": "Save button in the settings page"
 	},
+	"options_addlanguage": {
+		"message": "Add language",
+		"description": "Title for the 'Add language' dialog"
+	},
+	"options_addlanguage_addbutton": {
+		"message": "Add",
+		"description": "Add button in the footer of the languages list"
+	},
+	"options_language_label": {
+		"message": "Language:",
+		"description": "Label for the language selector in the 'Add language' dialog"
+	},
+	"options_credits": {
+		"message": "Credits",
+		"description": "Title for the credits link and dialog"
+	},
+	"options_credits_homepage": {
+		"message": "homepage",
+		"description": "Homepage link for an item in the credits. NOTE: put in in lowercase letters"
+	},
+	"options_credits_by": {
+		"message": "by",
+		"description": "Fragment of the author statement in an item of the credits. NOTE: put in in lowercase letters. EXAMPLE: '{{options_credits_by}} Adrià Vilanova Martínez'"
+	},
+	"options_ok": {
+		"message": "OK",
+		"description": "OK button in the dialogs"
+	},
+	"options_cancel": {
+		"message": "Cancel",
+		"description": "Cancel button in the dialogs"
+	},
 	"notification_install_title": { "message": "Thanks for installing 'Translate Selected Text'" },
 	"notification_install_message": { "message": "Click this notification to set it up." },
 	"notification_upgradedtostorage_title": { "message": "'Translate Selected Text' was updated to v0.6!" },
diff --git a/_locales/es/messages.json b/_locales/es/messages.json
index b643411..5bea4c9 100644
--- a/_locales/es/messages.json
+++ b/_locales/es/messages.json
@@ -61,6 +61,38 @@
 		"message": "Guardar",
 		"description": "Save button in the settings app"
 	},
+	"options_addlanguage": {
+		"message": "Añadir idioma",
+		"description": "Title for the 'Add language' dialog"
+	},
+	"options_addlanguage_addbutton": {
+		"message": "Añade",
+		"description": "Add button in the footer of the languages list"
+	},
+	"options_language_label": {
+		"message": "Idioma:",
+		"description": "Label for the language selector in the 'Add language' dialog"
+	},
+	"options_credits": {
+		"message": "Créditos",
+		"description": "Title for the credits link and dialog"
+	},
+	"options_credits_homepage": {
+		"message": "página web",
+		"description": "Homepage link for an item in the credits. NOTE: put in in lowercase letters"
+	},
+	"options_credits_by": {
+		"message": "",
+		"description": "Fragment of the author statement in an item of the credits. NOTE: put in in lowercase letters. EXAMPLE: '{{options_credits_by}} Adrià Vilanova Martínez'"
+	},
+	"options_ok": {
+		"message": "OK",
+		"description": "OK button in the dialogs"
+	},
+	"options_cancel": {
+		"message": "Cancelar",
+		"description": "Cancel button in the dialogs"
+	},
 	"notification_install_title": { "message": "Gracias por instalar 'Traducir Texto Seleccionado'" },
 	"notification_install_message": { "message": "Haz clic en esta notificación para configurar la extensión." },
 	"notification_upgradedtostorage_title": { "message": "'Traducir Texto Seleccionado' se ha actualizado a v0.6!" },
diff --git a/_locales/ru/messages.json b/_locales/ru/messages.json
index 7c8503b..b370213 100644
--- a/_locales/ru/messages.json
+++ b/_locales/ru/messages.json
@@ -1,8 +1,3 @@
-/*
- * Translation contributed by Alexander Simkin
- *
- *
- */
 {
     "appName": {
         "message": "Перевести выбранный текст",