diff --git a/handler/main.go b/handler/main.go
index e2e6398..0e97c6f 100644
--- a/handler/main.go
+++ b/handler/main.go
@@ -1,6 +1,7 @@
 package handler
 
 import (
+	"fyne.io/fyne/v2/lang"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/kernel"
 	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/localizer"
 )
@@ -29,8 +30,11 @@ func NewMainHandler(
 func (h MainHandler) Start() {
 	language, err := h.localizerRepository.GetCode()
 	if err != nil {
-		h.menuHandler.LanguageSelection()
-		return
+		err = h.app.GetLocalizerService().SetCurrentLanguageByCode(lang.SystemLocale().LanguageString())
+		if err != nil {
+			h.menuHandler.LanguageSelection()
+			return
+		}
 	}
 	_ = h.app.GetLocalizerService().SetCurrentLanguageByCode(language)