diff --git a/README.md b/README.md
index 504825c..ac8b0b7 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,16 @@ Google Translate TUI
 go get && go build
 ```
 
+## Language in argument
+
+You can pass `-src` and `-dst` in argument to set source and destination language.
+
+```
+gtt -src "English" -dst "Chinese (Traditional)"
+```
+
+See language on [Google Language support](https://cloud.google.com/translate/docs/languages)
+
 ## Key Map
 
 `<C-c>`
diff --git a/config.go b/config.go
index 9316a23..b0fba39 100644
--- a/config.go
+++ b/config.go
@@ -1,9 +1,15 @@
 package main
 
 import (
+	"flag"
 	"os"
 )
 
+var (
+	srcLangArg *string = flag.String("src", "", "Source Language")
+	dstLangArg *string = flag.String("dst", "", "Destination Language")
+)
+
 // Search XDG_CONFIG_HOME or $HOME/.config
 func configInit() {
 	var defaultConfigPath string
@@ -33,8 +39,17 @@ func configInit() {
 	}
 
 	// setup
-	translator.SrcLang = config.GetString("source.language")
-	translator.DstLang = config.GetString("destination.language")
+	flag.Parse()
+	if len(*srcLangArg) > 0 {
+		translator.SrcLang = *srcLangArg
+	} else {
+		translator.SrcLang = config.GetString("source.language")
+	}
+	if len(*dstLangArg) > 0 {
+		translator.DstLang = *dstLangArg
+	} else {
+		translator.DstLang = config.GetString("destination.language")
+	}
 	style.Theme = config.GetString("theme")
 	style.Transparent = config.GetBool("transparent")
 	style.SetSrcBorderColor(config.GetString("source.borderColor")).
@@ -45,6 +60,18 @@ func configInit() {
 func updateConfig() {
 	changed := false
 
+	// Source language is not passed in argument
+	if len(*srcLangArg) == 0 &&
+		config.GetString("source.language") != translator.SrcLang {
+		changed = true
+		config.Set("source.language", translator.SrcLang)
+	}
+	// Destination language is not passed in argument
+	if len(*dstLangArg) == 0 &&
+		config.GetString("destination.language") != translator.DstLang {
+		changed = true
+		config.Set("destination.language", translator.DstLang)
+	}
 	if config.GetString("theme") != style.Theme {
 		changed = true
 		config.Set("theme", style.Theme)
@@ -53,18 +80,10 @@ func updateConfig() {
 		changed = true
 		config.Set("transparent", style.Transparent)
 	}
-	if config.GetString("source.language") != translator.SrcLang {
-		changed = true
-		config.Set("source.language", translator.SrcLang)
-	}
 	if config.GetString("source.borderColor") != style.SrcBorderStr() {
 		changed = true
 		config.Set("source.borderColor", style.SrcBorderStr())
 	}
-	if config.GetString("destination.language") != translator.DstLang {
-		changed = true
-		config.Set("destination.language", translator.DstLang)
-	}
 	if config.GetString("destination.borderColor") != style.DstBorderStr() {
 		changed = true
 		config.Set("destination.borderColor", style.DstBorderStr())