diff -pruN kasumi-2.5.orig/KasumiWord.cxx kasumi-2.5/KasumiWord.cxx
--- kasumi-2.5.orig/KasumiWord.cxx	2009-01-20 23:16:46.000000000 +0900
+++ kasumi-2.5/KasumiWord.cxx	2022-02-22 13:23:48.370368975 +0900
@@ -188,7 +188,7 @@ void KasumiWord::setSound(const string &
 
     if(invalidChar != ""){
 	string message;
-	message = string(_("Sound must consist of only Hiragana characters. You have entered invalid character: "));
+	message = string(_("You have entered invalid character: "));
 	message += invalidChar;
 	throw KasumiException(message, ERR_DIALOG, ALERT_ONLY);
     }
@@ -211,7 +211,7 @@ void KasumiWord::setSoundByUTF8(const st
 
     if(invalidChar != ""){
 	string message;
-	message = string(_("Sound must consist of only Hiragana characters. You have entered invalid character: "));
+	message = string(_("You have entered invalid character: "));
 	message += invalidChar;
 	throw KasumiException(message, ERR_DIALOG, ALERT_ONLY);
     }
diff -pruN kasumi-2.5.orig/po/it.po kasumi-2.5/po/it.po
--- kasumi-2.5.orig/po/it.po	2009-07-21 18:18:58.000000000 +0900
+++ kasumi-2.5/po/it.po	2022-02-22 13:27:24.171273941 +0900
@@ -19,10 +19,10 @@ msgstr ""
 
 #: KasumiWord.cxx:191 KasumiWord.cxx:214
 msgid ""
-"Sound must consist of only Hiragana characters. You have entered invalid "
+"You have entered invalid "
 "character: "
 msgstr ""
-"Il suono deve contenere solo caratteri Hiragana. Sono stati inseriti "
+"Sono stati inseriti "
 "caratteri non validi."
 
 #: KasumiMainWindow.cxx:81
diff -pruN kasumi-2.5.orig/po/ja.po kasumi-2.5/po/ja.po
--- kasumi-2.5.orig/po/ja.po	2009-07-21 18:18:58.000000000 +0900
+++ kasumi-2.5/po/ja.po	2022-02-22 13:25:36.977321153 +0900
@@ -17,9 +17,9 @@ msgstr ""
 
 #: KasumiWord.cxx:191 KasumiWord.cxx:214
 msgid ""
-"Sound must consist of only Hiragana characters. You have entered invalid "
+"You have entered invalid "
 "character: "
-msgstr "読みにひらがな以外の文字を入力することはできません: "
+msgstr "無効な文字を入力しました: "
 
 #: KasumiMainWindow.cxx:81
 msgid "Kasumi"