ui: fix grammar mistakes (#570)

packages/hydrooj/locales/zh_TW.yaml

@@ -274,7 +274,7 @@ New Password: 新密碼
 New Training Plan: 新訓練計劃
 New: 創建
 No dataset at present.: 暫無測試資料。
-no discussion yet...: 目前沒有討論…
+No discussion yet...: 目前沒有討論…
 No Permission to Attend Contest: 您沒有許可權參加比賽
 No Permission to Claim Homework: 您沒有權限認領功課
 No Permission to Create a Discussion: 您沒有許可權創建討論
@@ -435,7 +435,7 @@ Sign Up: 註冊
 Solutions Liked: 題解被贊
 Solutions: 題解
 Solve: 解決
-Sorry, there is no problem in the problem set: 題庫中沒有題目
+Sorry, there are no problems in the problem set.: 題庫中沒有題目
 Sorry: 對不起
 Sort by: 排序
 Star Topic: 收藏討論
@@ -543,13 +543,13 @@ Will be used as the domain icon.: 將被用作圖示。
 Without slashes or backslashes: 不含斜槓和反斜槓
 Write Your Comment: 發表您的評論
 Write Your Solution: 發表您的題解
-You can create your own training plans and share with others.: 您可以創建您自己的訓練計劃並且與他人分享。
+You can create your own training plans and share them with others.: 您可以創建您自己的訓練計劃並且與他人分享。
 You cannot submit for this problem because the homework's deadline is due.: 功課已到達截止時間，您無法遞交了。
 You don't have the required permission ({0}) in this domain.: 您在該域中無相應許可權 ({0})。
 You don't have the required privilege.: 您沒有相應的特權。
 You don't own any domain and don't have privilege to create domain.: 您不擁有任何域也沒有創建域的特權。
 You have not submitted any solutions for this problem: 您在該題下沒有遞交過任何解答
-You have permissions to create problems for this domain.: 您有許可權為此域創建題目。
+You have permission to create problems for this domain.: 您有許可權為此域創建題目。
 You haven't attended this contest yet.: 您還沒有參加本次比賽。
 You haven't claimed this homework yet.: 您還未認領該功課。
 You're not logged in.: 您沒有登入。