diff --git a/common.go b/common.go
new file mode 100644
index 0000000..510a450
--- /dev/null
+++ b/common.go
@@ -0,0 +1,17 @@
+package langx
+
+import "context"
+
+const ctxLangKey string = "ctxLang"
+
+func SetCtxLang(ctx context.Context, lang string) context.Context {
+	return context.WithValue(ctx, ctxLangKey, lang)
+}
+
+func GetCtxLang(ctx context.Context) string {
+	lang, ok := ctx.Value(ctxLangKey).(string)
+	if !ok {
+		return ""
+	}
+	return lang
+}
diff --git a/error.go b/error.go
index 7abbb4e..4fb5878 100644
--- a/error.go
+++ b/error.go
@@ -5,10 +5,11 @@ import (
 )
 
 type LangError interface {
-	Error() string                                                                  // 实现error接口&获取翻译后的错误信息
-	GetCode() int                                                                   // 获取翻译后的Code
-	GetKey() string                                                                 // 获取原Key值
-	GetFormat() map[string]string                                                   // 获取附加数据
+	Error() string                // 实现error接口&获取翻译后的错误信息
+	GetCode() int                 // 获取翻译后的Code
+	GetKey() string               // 获取原Key值
+	GetFormat() map[string]string // 获取附加数据
+	SetLang(lang string)          // 设置语言
 }
 
 type langError struct {
@@ -17,15 +18,8 @@ type langError struct {
 	format map[string]string
 }
 
-type errorConst string
-
-func (e *langError) Error() string {
-	errLang := e.ctx.Value(errorLang)
-	l := ""
-	if errLang != nil {
-		l = string(errLang.(errorConst))
-	}
-	return GetFormat(l, e.key, e.format)
+func (l *langError) Error() string {
+	return GetFormat(GetCtxLang(l.ctx), l.key, l.format)
 }
 
 func (e *langError) GetCode() int {
@@ -43,7 +37,11 @@ func (e *langError) GetFormat() map[string]string {
 	return e.format
 }
 
-func NewErrorFormat(ctx context.Context, key string, format map[string]string) error {
+func (e *langError) SetLang(lang string) {
+	e.ctx = SetCtxLang(e.ctx, lang)
+}
+
+func NewErrorf(ctx context.Context, key string, format map[string]string) error {
 	return &langError{
 		ctx:    ctx,
 		key:    key,
@@ -57,9 +55,3 @@ func NewError(ctx context.Context, key string) error {
 		key: key,
 	}
 }
-
-const errorLang errorConst = "errorLang"
-
-func SetCtxLang(ctx context.Context, lang string) context.Context {
-	return context.WithValue(ctx, errorLang, lang)
-}
diff --git a/error_test.go b/error_test.go
index 60608e1..857d03f 100644
--- a/error_test.go
+++ b/error_test.go
@@ -40,13 +40,19 @@ func TestError(t *testing.T) {
 		t.Log(val.GetCode())
 	}
 
-	err = langx.NewErrorFormat(ctx, "username", map[string]string{
+	err = langx.NewErrorf(ctx, "username", map[string]string{
 		"name": "yuninks",
 	})
 	t.Log(err.Error())
 	val, ok = err.(langx.LangError)
 	if ok {
 		t.Log(val.GetCode())
+
+		// 设置输出语言
+		val.SetLang("en")
+
 	}
 
+	t.Log(val.Error())
+
 }
diff --git a/example/enample2.go b/example/enample2.go
index ad4f45e..4c49a18 100644
--- a/example/enample2.go
+++ b/example/enample2.go
@@ -33,7 +33,7 @@ func (l Language) Error() error {
 }
 
 func (l Language) Errorf(format map[string]string) error {
-	return langx.NewErrorFormat(context.Background(), l.String(), format)
+	return langx.NewErrorf(context.Background(), l.String(), format)
 }
 
 var (
diff --git a/example/lang/code.json b/example/imports/lang/code.json
similarity index 100%
rename from example/lang/code.json
rename to example/imports/lang/code.json
diff --git a/example/lang/en.json b/example/imports/lang/en.json
similarity index 100%
rename from example/lang/en.json
rename to example/imports/lang/en.json
diff --git a/example/lang/zh.json b/example/imports/lang/zh.json
similarity index 100%
rename from example/lang/zh.json
rename to example/imports/lang/zh.json
diff --git a/example/main.go b/example/imports/main.go
similarity index 100%
rename from example/main.go
rename to example/imports/main.go
diff --git a/example/imports/readme.md b/example/imports/readme.md
new file mode 100644
index 0000000..d1093cf
--- /dev/null
+++ b/example/imports/readme.md
@@ -0,0 +1,7 @@
+# 导入资源
+
+# 通过embed导入
+
+# 通过文件导入
+
+# 追加导入
diff --git a/langx.go b/langx.go
index 935216a..d115a3e 100644
--- a/langx.go
+++ b/langx.go
@@ -273,10 +273,9 @@ func GetDefaultLang() string {
 }
 
 func getLangFromCtx(ctx context.Context) string {
-	ctxVal := ctx.Value(l.ops.ctxLangKey)
-	lang := l.ops.defaultLang
-	if ctxVal != nil {
-		lang = ctxVal.(string)
+	lang := GetCtxLang(ctx)
+	if lang == "" {
+		lang = l.ops.defaultLang
 	}
 	return lang
 }
diff --git a/options.go b/options.go
index 1d69fae..ec33529 100644
--- a/options.go
+++ b/options.go
@@ -4,7 +4,7 @@ type options struct {
 	defaultCode int
 	defaultLang string
 	replaceKey  string
-	ctxLangKey  string
+	// ctxLangKey  string
 }
 
 func defaultOptions() *options {
@@ -12,7 +12,7 @@ func defaultOptions() *options {
 		defaultCode: 200,
 		defaultLang: "zh",
 		replaceKey:  "#%s#",
-		ctxLangKey:  "language",
+		// ctxLangKey:  "language",
 	}
 }
 
@@ -33,11 +33,11 @@ func SetDefaultCode(code int) Option {
 }
 
 // 从ctx里面获取语言的key
-func SetCtxLangKey(key string) Option {
-	return func(o *options) {
-		o.ctxLangKey = key
-	}
-}
+// func SetCtxLangKey(key string) Option {
+// 	return func(o *options) {
+// 		o.ctxLangKey = key
+// 	}
+// }
 
 // 默认语言
 func SetDefaultLanguage(lang string) Option {