Add zh-TW translations (#428)

There are a few conventional choices but this one should be friendly
and generally accepted by local reader.

Previous version is still comprehensible but lesser users (perhaps
used in Japanese documents) and may give local users a pause.

app/static/settings/languages.json

@@ -8,7 +8,7 @@
   {"name": "Bulgarian (български)", "value": "lang_bg"},
   {"name": "Catalan (Català)", "value": "lang_ca"},
   {"name": "Chinese, Simplified (简体中文)", "value": "lang_zh-CN"},
-  {"name": "Chinese, Traditional (繁体中文)", "value": "lang_zh-TW"},
+  {"name": "Chinese, Traditional (正體中文)", "value": "lang_zh-TW"},
   {"name": "Croatian (Hrvatski)", "value": "lang_hr"},
   {"name": "Czech (čeština)", "value": "lang_cs"},
   {"name": "Danish (Dansk)", "value": "lang_da"},

app/static/settings/translations.json

@@ -361,5 +361,38 @@
         "light": "Světlý",
         "dark": "Tmavý",
         "system": "Systémový"
+    },
+    "lang_zh-TW": {
+        "search": "搜尋",
+        "config": "設定",
+        "config-country": "依國家過濾結果",
+        "config-country-help": "注意：一經套用，只有在部署在指定國家內的網站會出現在搜尋結果中。",
+        "config-lang": "界面語言",
+        "config-lang-search": "搜尋語言",
+        "config-near": "接近",
+        "config-near-help": "城市名",
+        "config-block": "排除",
+        "config-block-help": "網址列表，以逗號分隔",
+        "config-theme": "主題",
+        "config-nojs": "顯示 NoJS 連結",
+        "config-dark": "深色模式",
+        "config-safe": "安全搜尋",
+        "config-alts": "將社群網站連結換掉",
+        "config-alts-help": "將 Twitter/YouTube/Instagram 等網站的連結替換為尊重隱私的第三方網站。",
+        "config-new-tab": "以新分頁開啟連結",
+        "config-images": "完整尺寸圖片搜尋",
+        "config-images-help": "（實驗性）在桌面版圖片搜尋中增加「查看圖片」選項。這會使搜尋結果圖片解析度降低",
+        "config-tor": "使用 Tor",
+        "config-get-only": "僅限於 GET 要求",
+        "config-url": "首頁網址",
+        "config-css": "自定 CSS",
+        "load": "載入",
+        "apply": "套用",
+        "save-as": "另存為...",
+        "github-link": "在 GitHub 上查看",
+        "translate": "翻譯",
+        "light": "明亮的",
+        "dark": "黑暗的",
+        "system": "依系統"
     }
 }