diff --git a/errors/err_code.go b/errors/err_code.go
index 819fdec4..f976513e 100644
--- a/errors/err_code.go
+++ b/errors/err_code.go
@@ -12,6 +12,8 @@ import (
 	"github.com/pubgo/funk/proto/errorpb"
 	"github.com/pubgo/funk/stack"
 	"github.com/samber/lo"
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/types/known/structpb"
 )
@@ -39,13 +41,15 @@ func NewCodeErrWithMap(code *errorpb.ErrCode, details ...map[string]any) error {
 	return NewCodeErr(code, data)
 }
 
+var titleCaser = cases.Title(language.English)
+
 func NewCodeErrWithMsg(code *errorpb.ErrCode, msg string, details ...proto.Message) error {
 	code = cloneAndCheck(code)
 	if code == nil {
 		return nil
 	}
 
-	code.Message = strings.ToTitle(strings.TrimSpace(msg))
+	code.Message = titleCaser.String(strings.TrimSpace(msg))
 	return NewCodeErr(code, details...)
 }
 
diff --git a/errors/z_err_code_test.go b/errors/z_err_code_test.go
index a251c28e..1503fafd 100644
--- a/errors/z_err_code_test.go
+++ b/errors/z_err_code_test.go
@@ -16,3 +16,15 @@ func TestErrCode(t *testing.T) {
 
 	t.Log(errors.As(err1, testcodepb.TestErrCodeDbConn))
 }
+
+func TestNewCodeErrWithMsg(t *testing.T) {
+	err1 := errors.NewCodeErrWithMsg(testcodepb.TestErrCodeDbConn, "hello world")
+	var err2 *errors.ErrCode
+	if !errors.As(err1, &err2) {
+		t.Fatal("errors.As should have returned true")
+	}
+	if err2.Error() != "Hello World" {
+		t.Fatal("message not match")
+	}
+	t.Log(err2.Error())
+}