diff --git a/internal/domain/main-entities/ethnic/dto.go b/internal/domain/main-entities/ethnic/dto.go
index a8277e27..0d5aec53 100644
--- a/internal/domain/main-entities/ethnic/dto.go
+++ b/internal/domain/main-entities/ethnic/dto.go
@@ -5,8 +5,8 @@ import (
 )
 
 type CreateDto struct {
-	Code string `json:"code" validate:"maxLength=20"`
-	Name string `json:"name" validate:"maxLength=50"`
+	Code *string `json:"code" validate:"maxLength=20"`
+	Name string  `json:"name" validate:"maxLength=50"`
 }
 
 type ReadListDto struct {
@@ -23,17 +23,18 @@ type FilterDto struct {
 }
 
 type ReadDetailDto struct {
-	Id   uint16  `json:"id"`
+	Id   *uint16 `json:"id"`
 	Code *string `json:"code"`
 }
 
 type UpdateDto struct {
-	Id uint `json:"id"`
+	Id *uint `json:"id"`
 	CreateDto
 }
 
 type DeleteDto struct {
-	Id uint `json:"id"`
+	Id   *uint   `json:"id"`
+	Code *string `json:"code"`
 }
 
 type MetaDto struct {
diff --git a/internal/domain/main-entities/language/dto.go b/internal/domain/main-entities/language/dto.go
index 069fbf50..ce64e6ab 100644
--- a/internal/domain/main-entities/language/dto.go
+++ b/internal/domain/main-entities/language/dto.go
@@ -5,8 +5,8 @@ import (
 )
 
 type CreateDto struct {
-	Code string `json:"code" validate:"maxLength=10"`
-	Name string `json:"name" validate:"maxLength=50"`
+	Code *string `json:"code" validate:"maxLength=10"`
+	Name string  `json:"name" validate:"maxLength=50"`
 }
 
 type ReadListDto struct {
@@ -23,18 +23,19 @@ type FilterDto struct {
 }
 
 type ReadDetailDto struct {
-	Id   uint16 `json:"id"`
-	Code string `json:"code"`
-	Name string `json:"name"`
+	Id   *uint16 `json:"id"`
+	Code *string `json:"code"`
+	Name *string `json:"name"`
 }
 
 type UpdateDto struct {
-	Id uint16 `json:"id"`
+	Id *uint16 `json:"id"`
 	CreateDto
 }
 
 type DeleteDto struct {
-	Id uint16 `json:"id"`
+	Id   *uint16 `json:"id"`
+	Code *string `json:"code"`
 }
 
 type MetaDto struct {
diff --git a/internal/interface/main-handler/ethnic/handler.go b/internal/interface/main-handler/ethnic/handler.go
index 8af8bde9..b3b02541 100644
--- a/internal/interface/main-handler/ethnic/handler.go
+++ b/internal/interface/main-handler/ethnic/handler.go
@@ -33,19 +33,19 @@ func (obj myBase) GetList(w http.ResponseWriter, r *http.Request) {
 }
 
 func (obj myBase) GetDetail(w http.ResponseWriter, r *http.Request) {
-	id := rw.ValidateInt(w, "id", r.PathValue("id"))
-	if id <= 0 {
+	code := rw.ValidateString(w, "code", r.PathValue("code"))
+	if code == "" {
 		return
 	}
 	dto := e.ReadDetailDto{}
-	dto.Id = uint16(id)
+	dto.Code = &code
 	res, err := u.ReadDetail(dto)
 	rw.DataResponse(w, res, err)
 }
 
 func (obj myBase) Update(w http.ResponseWriter, r *http.Request) {
-	id := rw.ValidateInt(w, "id", r.PathValue("id"))
-	if id <= 0 {
+	code := rw.ValidateString(w, "code", r.PathValue("code"))
+	if code == "" {
 		return
 	}
 
@@ -53,19 +53,19 @@ func (obj myBase) Update(w http.ResponseWriter, r *http.Request) {
 	if res := rw.ValidateStructByIOR(w, r.Body, &dto); !res {
 		return
 	}
-	dto.Id = uint(id)
+	dto.Code = &code
 	res, err := u.Update(dto)
 	rw.DataResponse(w, res, err)
 }
 
 func (obj myBase) Delete(w http.ResponseWriter, r *http.Request) {
-	id := rw.ValidateInt(w, "id", r.PathValue("id"))
-	if id <= 0 {
+	code := rw.ValidateString(w, "code", r.PathValue("code"))
+	if code == "" {
 		return
 	}
 
 	dto := e.DeleteDto{}
-	dto.Id = uint(id)
+	dto.Code = &code
 	res, err := u.Delete(dto)
 	rw.DataResponse(w, res, err)
 }
diff --git a/internal/interface/main-handler/language/handler.go b/internal/interface/main-handler/language/handler.go
index 0c00bb1e..ca6c7338 100644
--- a/internal/interface/main-handler/language/handler.go
+++ b/internal/interface/main-handler/language/handler.go
@@ -33,19 +33,19 @@ func (obj myBase) GetList(w http.ResponseWriter, r *http.Request) {
 }
 
 func (obj myBase) GetDetail(w http.ResponseWriter, r *http.Request) {
-	id := rw.ValidateInt(w, "id", r.PathValue("id"))
-	if id <= 0 {
+	code := rw.ValidateString(w, "code", r.PathValue("code"))
+	if code == "" {
 		return
 	}
 	dto := e.ReadDetailDto{}
-	dto.Id = uint16(id)
+	dto.Code = &code
 	res, err := u.ReadDetail(dto)
 	rw.DataResponse(w, res, err)
 }
 
 func (obj myBase) Update(w http.ResponseWriter, r *http.Request) {
-	id := rw.ValidateInt(w, "id", r.PathValue("id"))
-	if id <= 0 {
+	code := rw.ValidateString(w, "code", r.PathValue("code"))
+	if code == "" {
 		return
 	}
 
@@ -53,19 +53,19 @@ func (obj myBase) Update(w http.ResponseWriter, r *http.Request) {
 	if res := rw.ValidateStructByIOR(w, r.Body, &dto); !res {
 		return
 	}
-	dto.Id = uint16(id)
+	dto.Code = &code
 	res, err := u.Update(dto)
 	rw.DataResponse(w, res, err)
 }
 
 func (obj myBase) Delete(w http.ResponseWriter, r *http.Request) {
-	id := rw.ValidateInt(w, "id", r.PathValue("id"))
-	if id <= 0 {
+	code := rw.ValidateString(w, "code", r.PathValue("code"))
+	if code == "" {
 		return
 	}
 
 	dto := e.DeleteDto{}
-	dto.Id = uint16(id)
+	dto.Code = &code
 	res, err := u.Delete(dto)
 	rw.DataResponse(w, res, err)
 }
diff --git a/internal/interface/main-handler/main-handler.go b/internal/interface/main-handler/main-handler.go
index b3a2b65b..013bc98c 100644
--- a/internal/interface/main-handler/main-handler.go
+++ b/internal/interface/main-handler/main-handler.go
@@ -323,7 +323,7 @@ func SetRoutes() http.Handler {
 	hc.RegCrud(r, "/v1/medicine-method", medicinemethod.O)
 	hc.RegCrud(r, "/v1/mcu-src-category", mcusrccategory.O)
 	hc.RegCrudByCode(r, "/v1/mcu-src", mcusrc.O)
-	hc.RegCrud(r, "/v1/ethnic", ethnic.O)
+	hc.RegCrudByCode(r, "/v1/ethnic", ethnic.O)
 	hc.RegCrud(r, "/v1/insurance-company", insurancecompany.O)
 	hc.RegCrudByCode(r, "/v1/medicine", medicine.O)
 	hc.RegCrudByCode(r, "/v1/device", device.O)
@@ -331,7 +331,7 @@ func SetRoutes() http.Handler {
 	hc.RegCrud(r, "/v1/doctor-fee", doctorfee.O)
 	hc.RegCrudByCode(r, "/v1/medical-action-src", medicalactionsrc.O)
 	hc.RegCrud(r, "/v1/medical-action-src-item", medicalactionsrcitem.O)
-	hc.RegCrud(r, "/v1/language", language.O)
+	hc.RegCrudByCode(r, "/v1/language", language.O)
 	hc.RegCrudByCode(r, "/v1/mcu-sub-src", mcusubsrc.O)
 	hc.RegCrud(r, "/v1/vehicle", vehicle.O)
 	hc.RegCrud(r, "/v1/vehicle-hist", vehiclehist.O)
diff --git a/internal/use-case/main-use-case/ethnic/case.go b/internal/use-case/main-use-case/ethnic/case.go
index c8ca95a1..f219eb02 100644
--- a/internal/use-case/main-use-case/ethnic/case.go
+++ b/internal/use-case/main-use-case/ethnic/case.go
@@ -166,7 +166,7 @@ func ReadDetail(input e.ReadDetailDto) (*d.Data, error) {
 }
 
 func Update(input e.UpdateDto) (*d.Data, error) {
-	rdDto := e.ReadDetailDto{Id: uint16(input.Id)}
+	rdDto := e.ReadDetailDto{Code: input.Code}
 	var data *e.Ethnic
 	var err error
 
@@ -222,7 +222,7 @@ func Update(input e.UpdateDto) (*d.Data, error) {
 }
 
 func Delete(input e.DeleteDto) (*d.Data, error) {
-	rdDto := e.ReadDetailDto{Id: uint16(input.Id)}
+	rdDto := e.ReadDetailDto{Code: input.Code}
 	var data *e.Ethnic
 	var err error
 
diff --git a/internal/use-case/main-use-case/ethnic/helper.go b/internal/use-case/main-use-case/ethnic/helper.go
index e53f707b..783f66ca 100644
--- a/internal/use-case/main-use-case/ethnic/helper.go
+++ b/internal/use-case/main-use-case/ethnic/helper.go
@@ -17,6 +17,6 @@ func setData[T *e.CreateDto | *e.UpdateDto](input T, data *e.Ethnic) {
 		inputSrc = &inputTemp.CreateDto
 	}
 
-	data.Code = inputSrc.Code
+	data.Code = *inputSrc.Code
 	data.Name = inputSrc.Name
 }
diff --git a/internal/use-case/main-use-case/ethnic/lib.go b/internal/use-case/main-use-case/ethnic/lib.go
index 0bc91e3f..d7cbe0b8 100644
--- a/internal/use-case/main-use-case/ethnic/lib.go
+++ b/internal/use-case/main-use-case/ethnic/lib.go
@@ -81,7 +81,14 @@ func ReadDetailData(input e.ReadDetailDto, event *pl.Event, dbx ...*gorm.DB) (*e
 		tx = dg.I
 	}
 
-	if err := tx.First(&data, input.Id).Error; err != nil {
+	if input.Code != nil {
+		tx = tx.Where("\"Code\" = ?", *input.Code)
+	}
+	if input.Id != nil {
+		tx = tx.Where("\"Id\" = ?", input.Id)
+	}
+
+	if err := tx.First(&data).Error; err != nil {
 		if processedErr := pu.HandleReadError(err, event, source, input.Id, data); processedErr != nil {
 			return nil, processedErr
 		}
diff --git a/internal/use-case/main-use-case/language/case.go b/internal/use-case/main-use-case/language/case.go
index 885bcfeb..15fccb51 100644
--- a/internal/use-case/main-use-case/language/case.go
+++ b/internal/use-case/main-use-case/language/case.go
@@ -166,7 +166,7 @@ func ReadDetail(input e.ReadDetailDto) (*d.Data, error) {
 }
 
 func Update(input e.UpdateDto) (*d.Data, error) {
-	rdDto := e.ReadDetailDto{Id: input.Id}
+	rdDto := e.ReadDetailDto{Code: input.Code}
 	var data *e.Language
 	var err error
 
@@ -222,7 +222,7 @@ func Update(input e.UpdateDto) (*d.Data, error) {
 }
 
 func Delete(input e.DeleteDto) (*d.Data, error) {
-	rdDto := e.ReadDetailDto{Id: input.Id}
+	rdDto := e.ReadDetailDto{Code: input.Code}
 	var data *e.Language
 	var err error
 
diff --git a/internal/use-case/main-use-case/language/helper.go b/internal/use-case/main-use-case/language/helper.go
index cd7215d4..caa47beb 100644
--- a/internal/use-case/main-use-case/language/helper.go
+++ b/internal/use-case/main-use-case/language/helper.go
@@ -17,6 +17,6 @@ func setData[T *e.CreateDto | *e.UpdateDto](input T, data *e.Language) {
 		inputSrc = &inputTemp.CreateDto
 	}
 
-	data.Code = inputSrc.Code
+	data.Code = *inputSrc.Code
 	data.Name = inputSrc.Name
 }
diff --git a/internal/use-case/main-use-case/language/lib.go b/internal/use-case/main-use-case/language/lib.go
index 11992794..ac0feccd 100644
--- a/internal/use-case/main-use-case/language/lib.go
+++ b/internal/use-case/main-use-case/language/lib.go
@@ -81,7 +81,17 @@ func ReadDetailData(input e.ReadDetailDto, event *pl.Event, dbx ...*gorm.DB) (*e
 		tx = dg.I
 	}
 
-	if err := tx.First(&data, input.Id).Error; err != nil {
+	if input.Code != nil {
+		tx = tx.Where("\"Code\" = ?", *input.Code)
+	}
+	if input.Id != nil {
+		tx = tx.Where("\"Id\" = ?", input.Id)
+	}
+	if input.Name != nil {
+		tx = tx.Where("\"Name\" = ?", *input.Name)
+	}
+
+	if err := tx.First(&data).Error; err != nil {
 		if processedErr := pu.HandleReadError(err, event, source, input.Id, data); processedErr != nil {
 			return nil, processedErr
 		}