New translations lang.en.yml (Japanese)

src/main/resources/languages/lang.ja.yml

@@ -60,6 +60,7 @@ RESTRICTED_SIGN_CREATED: "正常に作成しました!"
 PLAYER_NOT_FOUND: "Player not found!"
 NO_PERMISSION: "それを行う権限がありません!"
 INCORRECT_ITEM_ID: "ID名が不正です!"
+INVALID_CLIENT_NAME: "Your username is not a valid Minecraft username!"
 NOT_ENOUGH_PROTECTIONS: "保護を作成できませんでした!"
 CANNOT_CREATE_SHOP_HERE: "あなたがショップを作ることは出来ません!"
 TOGGLE_MESSAGES_OFF: "You will no longer receive messages from your shop(s)."