diff --git a/config.go b/config.go
index 9015438..547736d 100644
--- a/config.go
+++ b/config.go
@@ -18,6 +18,7 @@ func configInit() {
 	}
 	config.AddConfigPath("$HOME/.config/gtt")
 
+	// create config file if not exists
 	if err := config.ReadInConfig(); err != nil {
 		config.Set("transparent", false)
 		config.Set("theme", "Gruvbox")
@@ -28,4 +29,10 @@ func configInit() {
 		}
 		config.SafeWriteConfig();
 	}
+
+	// setup
+	theme = config.GetString("theme")
+	transparent = config.GetBool("transparent")
+	translator.src_lang = config.GetString("source_language")
+	translator.dst_lang = config.GetString("destination_language")
 }
diff --git a/main.go b/main.go
index 7fae2a2..c7962c5 100644
--- a/main.go
+++ b/main.go
@@ -18,13 +18,11 @@ var (
 	pages          = tview.NewPages()
 	window         Window
 	// config
-	theme       string = "Gruvbox"
-	transparent bool   = true
+	theme       string
+	transparent bool
 )
 
 func main() {
-	translator.src_lang = "English"
-	translator.dst_lang = "Chinese (Traditional)"
 	// result, _ := translator.Translate("Hello world\nApple\nbumper")
 	// fmt.Println(result)
 	configInit()