diff --git a/internal/ai/embedding.go b/internal/ai/embedding.go
index e88685e..60c01e4 100644
--- a/internal/ai/embedding.go
+++ b/internal/ai/embedding.go
@@ -25,7 +25,7 @@ var Embedding = &embedding{}
 func (s *embedding) GetModel(ctx context.Context) (*models.AIConfig, error) {
 	config, err := GetEnabledAIConfig(enums.AIModelTypeEmbedding)
 	if err != nil {
-		return nil, errorsx.BusinessError(2001, "未配置可用的 Embedding 模型")
+		return nil, errorsx.BusinessErrorI18n(2001, "error.embeddingModel.noneEnabled")
 	}
 	return config, nil
 }
diff --git a/internal/ai/openai_client.go b/internal/ai/openai_client.go
index 3c1f654..2ae519b 100644
--- a/internal/ai/openai_client.go
+++ b/internal/ai/openai_client.go
@@ -31,7 +31,7 @@ func newOpenAIClient(config models.AIConfig) openai.Client {
 func GetEnabledAIConfig(modelType enums.AIModelType) (*models.AIConfig, error) {
 	item := repositories.AIConfigRepository.GetEnabled(sqls.DB(), modelType)
 	if item == nil {
-		return nil, errorsx.BusinessError(2005, "未配置可用的 AI 配置")
+		return nil, errorsx.BusinessErrorI18n(2005, "error.aiConfig.noneEnabled")
 	}
 	return item, nil
 }
diff --git a/internal/oidcclient/oidcclient.go b/internal/oidcclient/oidcclient.go
index 248b1a4..4e9cd37 100644
--- a/internal/oidcclient/oidcclient.go
+++ b/internal/oidcclient/oidcclient.go
@@ -104,7 +104,7 @@ func Enabled() bool {
 
 func BuildAuthCodeURL(next string) (string, error) {
 	if !Enabled() {
-		return "", errorsx.BusinessError(1, "OIDC 登录未启用")
+		return "", errorsx.BusinessErrorI18n(1, "error.oidc.loginDisabled")
 	}
 	state, err := CreateState(next)
 	if err != nil {
@@ -115,7 +115,7 @@ func BuildAuthCodeURL(next string) (string, error) {
 
 func ExchangeCode(ctx context.Context, code string) (*Profile, error) {
 	if !Enabled() {
-		return nil, errorsx.BusinessError(1, "OIDC 登录未启用")
+		return nil, errorsx.BusinessErrorI18n(1, "error.oidc.loginDisabled")
 	}
 	code = strings.TrimSpace(code)
 	if code == "" {
@@ -149,7 +149,7 @@ func ExchangeCode(ctx context.Context, code string) (*Profile, error) {
 func CreateState(next string) (string, error) {
 	secret := stateSecret()
 	if secret == "" {
-		return "", errorsx.BusinessError(2, "OIDC 登录密钥未配置")
+		return "", errorsx.BusinessErrorI18n(2, "error.oidc.stateSecretMissing")
 	}
 	nonce, err := randomToken("os_")
 	if err != nil {
diff --git a/internal/pkg/httpx/params/params.go b/internal/pkg/httpx/params/params.go
index b510775..252f1fa 100644
--- a/internal/pkg/httpx/params/params.go
+++ b/internal/pkg/httpx/params/params.go
@@ -1,6 +1,7 @@
 package params
 
 import (
+	"agent-desk/internal/pkg/errorsx"
 	"errors"
 	"fmt"
 	"log/slog"
@@ -182,7 +183,7 @@ func FormValue(ctx *gin.Context, name string) string {
 func FormValueRequired(ctx *gin.Context, name string) (string, error) {
 	str := FormValue(ctx, name)
 	if len(str) == 0 {
-		return "", errors.New("参数：" + name + "不能为空")
+		return "", errorsx.InvalidParamI18n("error.param.required", name)
 	}
 	return str, nil
 }
diff --git a/internal/pkg/i18nx/locales/en-US.yml b/internal/pkg/i18nx/locales/en-US.yml
index 6d92981..64a1d9f 100644
--- a/internal/pkg/i18nx/locales/en-US.yml
+++ b/internal/pkg/i18nx/locales/en-US.yml
@@ -356,3 +356,36 @@ error.mcp.callToolFailed: "Failed to call MCP tool: %v"
 error.mcp.connectServerFailed: "Failed to connect to MCP Server: %v"
 error.wxwork.unsupportedOutboundMessageType: "Unsupported WeCom outbound message type: %s"
 error.wxwork.currentUnsupportedOutboundMessageType: "The current WeCom outbound message type is not supported yet: %s"
+error.param.required: "Parameter %s is required."
+error.oidc.loginDisabled: "OIDC login is not enabled."
+error.oidc.stateSecretMissing: "OIDC login secret is not configured."
+error.oidc.profileMissing: "OIDC user information does not exist."
+error.oidc.bindingDisabled: "The current OIDC binding has been disabled."
+error.oidc.boundUserMissing: "The system user bound to this OIDC account does not exist."
+error.wxwork.loginDisabled: "WeCom login is not enabled."
+error.wxwork.loginSecretMissing: "WeCom login secret is not configured."
+error.wxwork.profileMissing: "WeCom user information does not exist."
+error.wxwork.bindingDisabled: "The current WeCom binding has been disabled."
+error.wxwork.boundUserMissing: "The system user bound to this WeCom account does not exist."
+error.wxwork.userIDMissing: "Failed to get the WeCom user ID."
+error.wxwork.userIDTaken: "The WeCom user ID is already used as a system username."
+error.wxwork.mobileTaken: "The WeCom mobile number is already used by a system user."
+error.wxwork.emailTaken: "The WeCom email address is already used by a system user."
+error.wxwork.configIncomplete: "WeCom is not enabled or its configuration is incomplete."
+error.customerSession.secretMissing: "Customer session secret is not configured."
+error.conversation.createFailed: "Failed to create conversation."
+error.conversation.tagNotFound: "Tag not found."
+error.aiConfig.noneEnabled: "No available AI configuration is configured."
+error.embeddingModel.noneEnabled: "No available Embedding model is configured."
+error.agentTeamSchedule.startAtInvalid: "Invalid start time format."
+error.agentTeamSchedule.startAtInvalidWithFormat: "Invalid start time format. Use yyyy-MM-dd HH:mm:ss or RFC3339."
+error.agentTeamSchedule.endAtInvalid: "Invalid end time format."
+error.agentTeamSchedule.endAtInvalidWithFormat: "Invalid end time format. Use yyyy-MM-dd HH:mm:ss or RFC3339."
+error.agentTeamSchedule.startDateInvalid: "Invalid start date format."
+error.agentTeamSchedule.startDateInvalidWithFormat: "Invalid start date format. Use yyyy-MM-dd."
+error.agentTeamSchedule.endDateInvalid: "Invalid end date format."
+error.agentTeamSchedule.endDateInvalidWithFormat: "Invalid end date format. Use yyyy-MM-dd."
+error.agentTeamSchedule.startTimeInvalid: "Invalid start time format."
+error.agentTeamSchedule.startTimeInvalidWithFormat: "Invalid start time format. Use HH:mm or HH:mm:ss."
+error.agentTeamSchedule.endTimeInvalid: "Invalid end time format."
+error.agentTeamSchedule.endTimeInvalidWithFormat: "Invalid end time format. Use HH:mm or HH:mm:ss."
diff --git a/internal/pkg/i18nx/locales/zh-CN.yml b/internal/pkg/i18nx/locales/zh-CN.yml
index 2a4ffcc..9d21a38 100644
--- a/internal/pkg/i18nx/locales/zh-CN.yml
+++ b/internal/pkg/i18nx/locales/zh-CN.yml
@@ -356,3 +356,36 @@ error.mcp.callToolFailed: "调用 MCP 工具失败: %v"
 error.mcp.connectServerFailed: "连接 MCP Server 失败: %v"
 error.wxwork.unsupportedOutboundMessageType: "不支持的企业微信下行消息类型: %s"
 error.wxwork.currentUnsupportedOutboundMessageType: "当前暂不支持企业微信下行消息类型: %s"
+error.param.required: "参数：%s不能为空"
+error.oidc.loginDisabled: "OIDC 登录未启用"
+error.oidc.stateSecretMissing: "OIDC 登录密钥未配置"
+error.oidc.profileMissing: "OIDC 用户信息不存在"
+error.oidc.bindingDisabled: "当前 OIDC 绑定已停用"
+error.oidc.boundUserMissing: "OIDC 账号绑定的系统用户不存在"
+error.wxwork.loginDisabled: "企业微信登录未启用"
+error.wxwork.loginSecretMissing: "企业微信登录密钥未配置"
+error.wxwork.profileMissing: "企业微信用户信息不存在"
+error.wxwork.bindingDisabled: "当前企业微信绑定已停用"
+error.wxwork.boundUserMissing: "企业微信账号绑定的系统用户不存在"
+error.wxwork.userIDMissing: "企业微信用户ID获取失败"
+error.wxwork.userIDTaken: "企业微信用户ID已被系统用户名占用"
+error.wxwork.mobileTaken: "企业微信手机号已被系统用户占用"
+error.wxwork.emailTaken: "企业微信邮箱已被系统用户占用"
+error.wxwork.configIncomplete: "企业微信未启用或配置不完整"
+error.customerSession.secretMissing: "客服会话密钥未配置"
+error.conversation.createFailed: "创建会话失败"
+error.conversation.tagNotFound: "标签不存在"
+error.aiConfig.noneEnabled: "未配置可用的 AI 配置"
+error.embeddingModel.noneEnabled: "未配置可用的 Embedding 模型"
+error.agentTeamSchedule.startAtInvalid: "开始时间格式错误"
+error.agentTeamSchedule.startAtInvalidWithFormat: "开始时间格式错误，请使用 yyyy-MM-dd HH:mm:ss 或 RFC3339"
+error.agentTeamSchedule.endAtInvalid: "结束时间格式错误"
+error.agentTeamSchedule.endAtInvalidWithFormat: "结束时间格式错误，请使用 yyyy-MM-dd HH:mm:ss 或 RFC3339"
+error.agentTeamSchedule.startDateInvalid: "开始日期格式错误"
+error.agentTeamSchedule.startDateInvalidWithFormat: "开始日期格式错误，请使用 yyyy-MM-dd"
+error.agentTeamSchedule.endDateInvalid: "结束日期格式错误"
+error.agentTeamSchedule.endDateInvalidWithFormat: "结束日期格式错误，请使用 yyyy-MM-dd"
+error.agentTeamSchedule.startTimeInvalid: "开始时间格式错误"
+error.agentTeamSchedule.startTimeInvalidWithFormat: "开始时间格式错误，请使用 HH:mm 或 HH:mm:ss"
+error.agentTeamSchedule.endTimeInvalid: "结束时间格式错误"
+error.agentTeamSchedule.endTimeInvalidWithFormat: "结束时间格式错误，请使用 HH:mm 或 HH:mm:ss"
diff --git a/internal/services/agent_team_schedule_service.go b/internal/services/agent_team_schedule_service.go
index acf7194..62d59af 100644
--- a/internal/services/agent_team_schedule_service.go
+++ b/internal/services/agent_team_schedule_service.go
@@ -92,11 +92,11 @@ func (s *agentTeamScheduleService) Count(cnd *sqls.Cnd) int64 {
 }
 
 func (s *agentTeamScheduleService) FindCalendarSchedules(req request.AgentTeamScheduleCalendarRequest) ([]models.AgentTeamSchedule, error) {
-	startAtValue, err := parseRequiredDateTime(req.StartAt, "开始时间格式错误")
+	startAtValue, err := parseRequiredDateTime(req.StartAt, "error.agentTeamSchedule.startAtInvalid", "error.agentTeamSchedule.startAtInvalidWithFormat")
 	if err != nil {
 		return nil, err
 	}
-	endAtValue, err := parseRequiredDateTime(req.EndAt, "结束时间格式错误")
+	endAtValue, err := parseRequiredDateTime(req.EndAt, "error.agentTeamSchedule.endAtInvalid", "error.agentTeamSchedule.endAtInvalidWithFormat")
 	if err != nil {
 		return nil, err
 	}
@@ -256,11 +256,11 @@ func (s *agentTeamScheduleService) buildScheduleModel(id, teamID int64, startAt,
 	if !slices.Contains(enums.StatusValues, team.Status) {
 		return nil, errorsx.InvalidParamI18n("error.e0174")
 	}
-	startAtValue, err := parseRequiredDateTime(startAt, "开始时间格式错误")
+	startAtValue, err := parseRequiredDateTime(startAt, "error.agentTeamSchedule.startAtInvalid", "error.agentTeamSchedule.startAtInvalidWithFormat")
 	if err != nil {
 		return nil, err
 	}
-	endAtValue, err := parseRequiredDateTime(endAt, "结束时间格式错误")
+	endAtValue, err := parseRequiredDateTime(endAt, "error.agentTeamSchedule.endAtInvalid", "error.agentTeamSchedule.endAtInvalidWithFormat")
 	if err != nil {
 		return nil, err
 	}
@@ -296,11 +296,11 @@ func (s *agentTeamScheduleService) buildBatchScheduleCandidates(req request.Agen
 	if err != nil {
 		return nil, err
 	}
-	startDate, err := parseRequiredDate(req.StartDate, "开始日期格式错误")
+	startDate, err := parseRequiredDate(req.StartDate, "error.agentTeamSchedule.startDateInvalid", "error.agentTeamSchedule.startDateInvalidWithFormat")
 	if err != nil {
 		return nil, err
 	}
-	endDate, err := parseRequiredDate(req.EndDate, "结束日期格式错误")
+	endDate, err := parseRequiredDate(req.EndDate, "error.agentTeamSchedule.endDateInvalid", "error.agentTeamSchedule.endDateInvalidWithFormat")
 	if err != nil {
 		return nil, err
 	}
@@ -310,11 +310,11 @@ func (s *agentTeamScheduleService) buildBatchScheduleCandidates(req request.Agen
 	if startDate.Before(startOfLocalDay(time.Now())) {
 		return nil, errorsx.InvalidParamI18n("error.e0085")
 	}
-	startClock, err := parseRequiredClock(req.StartTime, "开始时间格式错误")
+	startClock, err := parseRequiredClock(req.StartTime, "error.agentTeamSchedule.startTimeInvalid", "error.agentTeamSchedule.startTimeInvalidWithFormat")
 	if err != nil {
 		return nil, err
 	}
-	endClock, err := parseRequiredClock(req.EndTime, "结束时间格式错误")
+	endClock, err := parseRequiredClock(req.EndTime, "error.agentTeamSchedule.endTimeInvalid", "error.agentTeamSchedule.endTimeInvalidWithFormat")
 	if err != nil {
 		return nil, err
 	}
@@ -370,22 +370,22 @@ func (s *agentTeamScheduleService) buildBatchScheduleCandidates(req request.Agen
 	return candidates, nil
 }
 
-func parseRequiredDate(value, message string) (time.Time, error) {
+func parseRequiredDate(value, emptyKey, formatKey string) (time.Time, error) {
 	value = strings.TrimSpace(value)
 	if value == "" {
-		return time.Time{}, errorsx.InvalidParam(message)
+		return time.Time{}, errorsx.InvalidParamI18n(emptyKey)
 	}
 	ret, err := time.ParseInLocation(time.DateOnly, value, time.Local)
 	if err != nil {
-		return time.Time{}, errorsx.InvalidParam(message + "，请使用 yyyy-MM-dd")
+		return time.Time{}, errorsx.InvalidParamI18n(formatKey)
 	}
 	return startOfLocalDay(ret), nil
 }
 
-func parseRequiredClock(value, message string) (time.Time, error) {
+func parseRequiredClock(value, emptyKey, formatKey string) (time.Time, error) {
 	value = strings.TrimSpace(value)
 	if value == "" {
-		return time.Time{}, errorsx.InvalidParam(message)
+		return time.Time{}, errorsx.InvalidParamI18n(emptyKey)
 	}
 	layouts := []string{"15:04", "15:04:05"}
 	for _, layout := range layouts {
@@ -393,7 +393,7 @@ func parseRequiredClock(value, message string) (time.Time, error) {
 			return ret, nil
 		}
 	}
-	return time.Time{}, errorsx.InvalidParam(message + "，请使用 HH:mm 或 HH:mm:ss")
+	return time.Time{}, errorsx.InvalidParamI18n(formatKey)
 }
 
 func combineDateAndClock(date, clock time.Time) time.Time {
@@ -508,14 +508,14 @@ func uniquePositiveInt64s(values []int64) []int64 {
 	return ret
 }
 
-func parseRequiredDateTime(value, message string) (time.Time, error) {
+func parseRequiredDateTime(value, emptyKey, formatKey string) (time.Time, error) {
 	value = strings.TrimSpace(value)
 	if value == "" {
-		return time.Time{}, errorsx.InvalidParam(message)
+		return time.Time{}, errorsx.InvalidParamI18n(emptyKey)
 	}
 	ret, err := parseDateTimeValue(value)
 	if err != nil {
-		return time.Time{}, errorsx.InvalidParam(message + "，请使用 yyyy-MM-dd HH:mm:ss 或 RFC3339")
+		return time.Time{}, errorsx.InvalidParamI18n(formatKey)
 	}
 	return ret, nil
 }
diff --git a/internal/services/channel_service.go b/internal/services/channel_service.go
index c278a9c..100723b 100644
--- a/internal/services/channel_service.go
+++ b/internal/services/channel_service.go
@@ -169,7 +169,7 @@ func (s *channelService) ParseWxWorkKFChannelConfig(raw string) (*dto.WxWorkKFCh
 
 func (s *channelService) ListWxWorkKFAccounts() ([]response.WxWorkKFAccountResponse, error) {
 	if !wxwork.Enabled() || wxwork.GetWorkCli() == nil {
-		return nil, errorsx.BusinessError(1, "企业微信未启用或配置不完整")
+		return nil, errorsx.BusinessErrorI18n(1, "error.wxwork.configIncomplete")
 	}
 	cli, err := wxwork.GetWorkCli().GetKF()
 	if err != nil {
diff --git a/internal/services/conversation_service.go b/internal/services/conversation_service.go
index b8daf1c..7c790a6 100644
--- a/internal/services/conversation_service.go
+++ b/internal/services/conversation_service.go
@@ -159,7 +159,7 @@ func (s *conversationService) Create(externalUser openidentity.ExternalUser, cha
 		return nil, err
 	}
 	if conversation == nil {
-		return nil, errorsx.BusinessError(1, "创建会话失败")
+		return nil, errorsx.BusinessErrorI18n(1, "error.conversation.createFailed")
 	}
 	if !created {
 		return conversation, nil
diff --git a/internal/services/conversation_tag_service.go b/internal/services/conversation_tag_service.go
index f7d1821..f77da19 100644
--- a/internal/services/conversation_tag_service.go
+++ b/internal/services/conversation_tag_service.go
@@ -5,9 +5,9 @@ import (
 	"agent-desk/internal/pkg/dto"
 	"agent-desk/internal/pkg/dto/request"
 	"agent-desk/internal/pkg/enums"
+	"agent-desk/internal/pkg/errorsx"
 	"agent-desk/internal/pkg/utils"
 	"agent-desk/internal/repositories"
-	"errors"
 
 	"agent-desk/internal/pkg/httpx/params"
 
@@ -78,7 +78,7 @@ func (s *conversationTagService) IsExists(conversationID int64, tagID int64) boo
 func (s *conversationTagService) AddTag(req request.AddConversationTagRequest, operator *dto.AuthPrincipal) error {
 	tag := TagService.Get(req.TagID)
 	if tag == nil || tag.Status != enums.StatusOk {
-		return errors.New("标签不存在")
+		return errorsx.InvalidParamI18n("error.conversation.tagNotFound")
 	}
 	if s.IsExists(req.ConversationID, req.TagID) {
 		return nil
diff --git a/internal/services/customer_session_service.go b/internal/services/customer_session_service.go
index 9e03de8..1bd4dc9 100644
--- a/internal/services/customer_session_service.go
+++ b/internal/services/customer_session_service.go
@@ -90,7 +90,7 @@ func (s *customerSessionService) Sign(channel *models.Channel, customer *models.
 	cfg := config.Current().CustomerSession
 	secret := strings.TrimSpace(cfg.Secret)
 	if secret == "" {
-		return "", time.Time{}, errorsx.BusinessError(1, "客服会话密钥未配置")
+		return "", time.Time{}, errorsx.BusinessErrorI18n(1, "error.customerSession.secretMissing")
 	}
 	if channel == nil || customer == nil {
 		return "", time.Time{}, errorsx.InvalidParamI18n("error.e0158")
@@ -168,7 +168,7 @@ func (s *customerSessionService) verifyToken(rawToken string) (*customerSessionC
 	cfg := config.Current().CustomerSession
 	secret := strings.TrimSpace(cfg.Secret)
 	if secret == "" {
-		return nil, errorsx.BusinessError(1, "客服会话密钥未配置")
+		return nil, errorsx.BusinessErrorI18n(1, "error.customerSession.secretMissing")
 	}
 	claims := &customerSessionClaims{}
 	token, err := jwt.ParseWithClaims(rawToken, claims, func(token *jwt.Token) (any, error) {
diff --git a/internal/services/oidc_login_service.go b/internal/services/oidc_login_service.go
index 7cb54b4..9fc25d2 100644
--- a/internal/services/oidc_login_service.go
+++ b/internal/services/oidc_login_service.go
@@ -61,7 +61,7 @@ func (s *oidcLoginService) ExchangeOIDCLoginTicket(ticket string) (*response.Log
 
 func (s *oidcLoginService) loginWithOIDCProfile(profile *oidcLoginProfile, authCfg config.AuthConfig, clientIP, userAgent string) (*response.LoginResponse, error) {
 	if profile == nil || strings.TrimSpace(profile.Subject) == "" {
-		return nil, errorsx.BusinessError(2, "OIDC 用户信息不存在")
+		return nil, errorsx.BusinessErrorI18n(2, "error.oidc.profileMissing")
 	}
 
 	var ret *response.LoginResponse
@@ -78,11 +78,11 @@ func (s *oidcLoginService) loginWithOIDCProfile(profile *oidcLoginProfile, authC
 			}
 		} else {
 			if identity.Status != enums.StatusOk {
-				return errorsx.BusinessError(3, "当前 OIDC 绑定已停用")
+				return errorsx.BusinessErrorI18n(3, "error.oidc.bindingDisabled")
 			}
 			user = repositories.UserRepository.Get(ctx.Tx, identity.UserID)
 			if user == nil {
-				return errorsx.BusinessError(4, "OIDC 账号绑定的系统用户不存在")
+				return errorsx.BusinessErrorI18n(4, "error.oidc.boundUserMissing")
 			}
 		}
 
diff --git a/internal/services/wxwork_login_service.go b/internal/services/wxwork_login_service.go
index 7519533..bb3cee9 100644
--- a/internal/services/wxwork_login_service.go
+++ b/internal/services/wxwork_login_service.go
@@ -24,7 +24,7 @@ type wxWorkLoginService struct {
 
 func (s *wxWorkLoginService) BuildWxWorkLoginURL(next string) (string, error) {
 	if !wxwork.Enabled() {
-		return "", errorsx.BusinessError(1, "企业微信登录未启用")
+		return "", errorsx.BusinessErrorI18n(1, "error.wxwork.loginDisabled")
 	}
 	state, err := wxwork.CreateState(next)
 	if err != nil {
@@ -35,7 +35,7 @@ func (s *wxWorkLoginService) BuildWxWorkLoginURL(next string) (string, error) {
 
 func (s *wxWorkLoginService) BuildWxWorkQRCodeLoginURL(next string) (string, error) {
 	if !wxwork.Enabled() {
-		return "", errorsx.BusinessError(1, "企业微信登录未启用")
+		return "", errorsx.BusinessErrorI18n(1, "error.wxwork.loginDisabled")
 	}
 	state, err := wxwork.CreateState(next)
 	if err != nil {
@@ -70,7 +70,7 @@ func (s *wxWorkLoginService) ExchangeWxWorkLoginTicket(ticket string) (*response
 
 func (s *wxWorkLoginService) loginWithWxWorkProfile(profile *wxwork.LoginUser, authCfg config.AuthConfig, clientIP, userAgent string) (*response.LoginResponse, error) {
 	if profile == nil || strings.TrimSpace(profile.UserID) == "" {
-		return nil, errorsx.BusinessError(2, "企业微信用户信息不存在")
+		return nil, errorsx.BusinessErrorI18n(2, "error.wxwork.profileMissing")
 	}
 
 	var ret *response.LoginResponse
@@ -87,11 +87,11 @@ func (s *wxWorkLoginService) loginWithWxWorkProfile(profile *wxwork.LoginUser, a
 			}
 		} else {
 			if identity.Status != enums.StatusOk {
-				return errorsx.BusinessError(3, "当前企业微信绑定已停用")
+				return errorsx.BusinessErrorI18n(3, "error.wxwork.bindingDisabled")
 			}
 			user = repositories.UserRepository.Get(ctx.Tx, identity.UserID)
 			if user == nil {
-				return errorsx.BusinessError(4, "企业微信账号绑定的系统用户不存在")
+				return errorsx.BusinessErrorI18n(4, "error.wxwork.boundUserMissing")
 			}
 		}
 
@@ -218,19 +218,19 @@ func (s *wxWorkLoginService) resolveWxWorkAvatar(current string, profile *wxwork
 
 func (s *wxWorkLoginService) checkWxWorkProfile(tx *gorm.DB, username, mobile string, email string) error {
 	if strs.IsBlank(username) {
-		return errorsx.BusinessError(5, "企业微信用户ID获取失败")
+		return errorsx.BusinessErrorI18n(5, "error.wxwork.userIDMissing")
 	}
 	if existing := repositories.UserRepository.GetByUsername(tx, username); existing != nil {
-		return errorsx.BusinessError(5, "企业微信用户ID已被系统用户名占用")
+		return errorsx.BusinessErrorI18n(5, "error.wxwork.userIDTaken")
 	}
 	if strs.IsNotBlank(mobile) {
 		if repositories.UserRepository.GetByMobile(tx, mobile) != nil {
-			return errorsx.BusinessError(6, "企业微信手机号已被系统用户占用")
+			return errorsx.BusinessErrorI18n(6, "error.wxwork.mobileTaken")
 		}
 	}
 	if strs.IsNotBlank(email) {
 		if repositories.UserRepository.GetByEmail(tx, email) != nil {
-			return errorsx.BusinessError(7, "企业微信邮箱已被系统用户占用")
+			return errorsx.BusinessErrorI18n(7, "error.wxwork.emailTaken")
 		}
 	}
 	return nil
diff --git a/internal/wxwork/login.go b/internal/wxwork/login.go
index b6c8350..d7044f2 100644
--- a/internal/wxwork/login.go
+++ b/internal/wxwork/login.go
@@ -82,7 +82,7 @@ func BuildQRCodeLoginURL(state string) (string, error) {
 func CreateState(next string) (string, error) {
 	secret := strings.TrimSpace(StateSecret())
 	if secret == "" {
-		return "", errorsx.BusinessError(1, "企业微信登录密钥未配置")
+		return "", errorsx.BusinessErrorI18n(1, "error.wxwork.loginSecretMissing")
 	}
 	payload := statePayload{
 		Next:      sanitizeNextPath(next),