Add new i18n languages and update existent ones

- Add 21 new languages where the UI was translated (all translations
  are 100% complete except for Chinese Simplified (96%)
  and Amharic (37%)).
- Update some translations for preexistent languages.

Change-Id: I64be0a2dd551c12af1547a616b4f49f97c471bde
diff --git a/src/_locales/zh_TW/messages.json b/src/_locales/zh_TW/messages.json
new file mode 100644
index 0000000..9f6cc4a
--- /dev/null
+++ b/src/_locales/zh_TW/messages.json
@@ -0,0 +1,114 @@
+{
+	"appName": {
+		"message": "翻譯選取文字",
+		"description": "The app name"
+	},
+	"appBetaName": {
+		"message": "翻譯所選文本(Beta)",
+		"description": "The beta app name"
+	},
+	"appDescription": {
+		"message": "翻譯選擇的文本與谷歌翻譯",
+		"description": "The app description"
+	},
+	"contextmenu_title": {
+		"message": "將所選內容轉換為..。",
+		"description": "Title of the context menu that appears when a right click is done. Inside this parent menu there are the menus"
+	},
+	"contextmenu_title2": {
+		"message": "將選區轉換為 \"$language$\"",
+		"description": "Title of the context menu that appears when a right click is done and there's only one language available.",
+		"placeholders": {
+			"language": {
+				"content": "$1",
+				"example": "Language to translate into."
+			}
+		}
+	},
+	"contextmenu_edit": {
+		"message": "编辑语言...",
+		"description": "Title of the option inside the 'Translate section into...' context menu."
+	},
+	"options_welcome": {
+		"message": "歡迎!",
+		"description": "Title of the options page"
+	},
+	"options_introduction": {
+		"message": "请在“翻译”菜单中选择要显示的语言。",
+		"description": "Introduction paragraph to the options pages"
+	},
+	"options_languageselectheader": {
+		"message": "語言:",
+		"description": "Header of the language select option."
+	},
+	"options_otheroptionsheader": {
+		"message": "其他選項",
+		"description": "Header of the options page."
+	},
+	"options_tabsoption_1": {
+		"message": "在每个翻译的新标签页中打开Google翻译。",
+		"description": "Option which defines how should the app behave in relation to tabs."
+	},
+	"options_tabsoption_2": {
+		"message": "在唯一標籤中打開Google翻譯,並覆蓋最後一次翻譯,而不是打開多個標籤。",
+		"description": "Option which defines how should the app behave in relation to tabs."
+	},
+	"options_tabsoption_3": {
+		"message": "在面板中打開Google翻譯(您需要激活<a href='chrome://flags/#enable-panels' id='panelsflag'> - 啟用面板</a>標誌)。 <sup style ='color:red; font-weight:bold;'>實驗</ sup>",
+		"description": "Option which defines how should the app behave in relation to tabs."
+	},
+	"options_savebutton": {
+		"message": "儲存",
+		"description": "Save button in the settings page"
+	},
+	"options_addlanguage": {
+		"message": "添加語言",
+		"description": "Title for the 'Add language' dialog"
+	},
+	"options_addlanguage_addbutton": {
+		"message": "添加",
+		"description": "Add button in the footer of the languages list"
+	},
+	"options_language_label": {
+		"message": "语言:",
+		"description": "Label for the language selector in the 'Add language' dialog"
+	},
+	"options_credits": {
+		"message": "製作人員",
+		"description": "Title for the credits link and dialog"
+	},
+	"options_credits_homepage": {
+		"message": "首頁",
+		"description": "Homepage link for an item in the credits. NOTE: put in in lowercase letters"
+	},
+	"options_credits_by": {
+		"message": "由",
+		"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": "好的",
+		"description": "OK button in the dialogs"
+	},
+	"options_cancel": {
+		"message": "取消",
+		"description": "Cancel button in the dialogs"
+	},
+	"notification_install_title": {
+		"message": "感謝您安裝 Translate Selected Text “翻譯所選文本”"
+	},
+	"notification_install_message": {
+		"message": "按一下此通知將其設置。"
+	},
+	"notification_upgradedtostorage_title": {
+		"message": "\"翻譯所選文本\" 更新為 v0.6!"
+	},
+	"notification_upgradedtostorage_message": {
+		"message": "現在您的選項將在所有設備上同步! \n壞的一面是你必須重新設置擴展名:-(點擊這個通知來設置它。"
+	},
+	"notification_reorder_title": {
+		"message": "\"翻譯所選文本\" 更新為 v0.7!"
+	},
+	"notification_reorder_message": {
+		"message": "現在, 您可以配置您希望語言在內容功能表中顯示的順序。"
+	}
+}