diff --git a/model/token.go b/model/token.go
index ef2d914b..8b320a0c 100644
--- a/model/token.go
+++ b/model/token.go
@@ -35,19 +35,19 @@ func SearchUserTokens(userId int, keyword string) (tokens []*Token, err error) {
 
 func ValidateUserToken(key string) (token *Token, err error) {
 	if key == "" {
-		return nil, errors.New("未提供 token")
+		return nil, errors.New("N/A (no text provided) token")
 	}
 	token = &Token{}
 	err = DB.Where("`key` = ?", key).First(token).Error
 	if err == nil {
 		if token.Status != common.TokenStatusEnabled {
-			return nil, errors.New("该 token 状态不可用")
+			return nil, errors.New("The token status is not enabled.")
 		}
 		if token.ExpiredTime != -1 && token.ExpiredTime < common.GetTimestamp() {
 			token.Status = common.TokenStatusExpired
 			err := token.SelectUpdate()
 			if err != nil {
-				common.SysError("更新 token 状态失败：" + err.Error())
+				common.SysError("Failed to update token status.：" + err.Error())
 			}
 			return nil, errors.New("该 token 已过期")
 		}
@@ -55,25 +55,25 @@ func ValidateUserToken(key string) (token *Token, err error) {
 			token.Status = common.TokenStatusExhausted
 			err := token.SelectUpdate()
 			if err != nil {
-				common.SysError("更新 token 状态失败：" + err.Error())
+				common.SysError("Failed to update token status.：" + err.Error())
 			}
-			return nil, errors.New("该 token 额度已用尽")
+			return nil, errors.New("This token's quota has been exhausted.")
 		}
 		go func() {
 			token.AccessedTime = common.GetTimestamp()
 			err := token.SelectUpdate()
 			if err != nil {
-				common.SysError("更新 token 失败：" + err.Error())
+				common.SysError("Failed to update token.：" + err.Error())
 			}
 		}()
 		return token, nil
 	}
-	return nil, errors.New("无效的 token")
+	return nil, errors.New("Invalid token")
 }
 
 func GetTokenByIds(id int, userId int) (*Token, error) {
 	if id == 0 || userId == 0 {
-		return nil, errors.New("id 或 userId 为空！")
+		return nil, errors.New("id or userId is empty!")
 	}
 	token := Token{Id: id, UserId: userId}
 	var err error = nil
@@ -83,7 +83,7 @@ func GetTokenByIds(id int, userId int) (*Token, error) {
 
 func GetTokenById(id int) (*Token, error) {
 	if id == 0 {
-		return nil, errors.New("id 为空！")
+		return nil, errors.New("id Is empty.！")
 	}
 	token := Token{Id: id}
 	var err error = nil
@@ -118,7 +118,7 @@ func (token *Token) Delete() error {
 func DeleteTokenById(id int, userId int) (err error) {
 	// Why we need userId here? In case user want to delete other's token.
 	if id == 0 || userId == 0 {
-		return errors.New("id 或 userId 为空！")
+		return errors.New("id or userId is empty.！")
 	}
 	token := Token{Id: id, UserId: userId}
 	err = DB.Where(token).First(&token).Error
@@ -130,7 +130,7 @@ func DeleteTokenById(id int, userId int) (err error) {
 
 func IncreaseTokenQuota(id int, quota int) (err error) {
 	if quota < 0 {
-		return errors.New("quota 不能为负数！")
+		return errors.New("quota Cannot be negative.！")
 	}
 	err = DB.Model(&Token{}).Where("id = ?", id).Update("remain_quota", gorm.Expr("remain_quota + ?", quota)).Error
 	return err
@@ -138,7 +138,7 @@ func IncreaseTokenQuota(id int, quota int) (err error) {
 
 func DecreaseTokenQuota(id int, quota int) (err error) {
 	if quota < 0 {
-		return errors.New("quota 不能为负数！")
+		return errors.New("quota Cannot be negative.！")
 	}
 	err = DB.Model(&Token{}).Where("id = ?", id).Update("remain_quota", gorm.Expr("remain_quota - ?", quota)).Error
 	return err
@@ -146,21 +146,21 @@ func DecreaseTokenQuota(id int, quota int) (err error) {
 
 func PreConsumeTokenQuota(tokenId int, quota int) (err error) {
 	if quota < 0 {
-		return errors.New("quota 不能为负数！")
+		return errors.New("quota Cannot be negative.！")
 	}
 	token, err := GetTokenById(tokenId)
 	if err != nil {
 		return err
 	}
 	if !token.UnlimitedQuota && token.RemainQuota < quota {
-		return errors.New("令牌额度不足")
+		return errors.New("Token quota insufficient.")
 	}
 	userQuota, err := GetUserQuota(token.UserId)
 	if err != nil {
 		return err
 	}
 	if userQuota < quota {
-		return errors.New("用户额度不足")
+		return errors.New("User quota insufficient.")
 	}
 	quotaTooLow := userQuota >= common.QuotaRemindThreshold && userQuota-quota < common.QuotaRemindThreshold
 	noMoreQuota := userQuota-quota <= 0
@@ -168,18 +168,18 @@ func PreConsumeTokenQuota(tokenId int, quota int) (err error) {
 		go func() {
 			email, err := GetUserEmail(token.UserId)
 			if err != nil {
-				common.SysError("获取用户邮箱失败：" + err.Error())
+				common.SysError("Failed to get user email.：" + err.Error())
 			}
-			prompt := "您的额度即将用尽"
+			prompt := "Your quota is running low."
 			if noMoreQuota {
-				prompt = "您的额度已用尽"
+				prompt = "Your quota has run out."
 			}
 			if email != "" {
 				topUpLink := fmt.Sprintf("%s/topup", common.ServerAddress)
 				err = common.SendEmail(prompt, email,
-					fmt.Sprintf("%s，当前剩余额度为 %d，为了不影响您的使用，请及时充值。<br/>充值链接：<a href='%s'>%s</a>", prompt, userQuota, topUpLink, topUpLink))
+					fmt.Sprintf("%s，Current remaining quota is %d，To avoid any disruption to your usage,，Please top up your account promptly.。<br/>Top-up link.：<a href='%s'>%s</a>", prompt, userQuota, topUpLink, topUpLink))
 				if err != nil {
-					common.SysError("发送邮件失败：" + err.Error())
+					common.SysError("Failed to send email.：" + err.Error())
 				}
 			}
 		}()