'success', 'fail' => 'fail', 'login_success' => 'login success', 'password_error' => 'password error', 'user_none' => 'user none', 'not_null' => 'not null', 'code_error' => 'code error', 'format_error' => 'format error', 'email_repeat' => 'email repeat', 'save_success' => 'save success', 'save_fail' => 'save fail', 'register_success' => 'register success', 'register_fail' => 'register fail', 'language_success' => 'Successfully switched languages', 'language_fail' => 'Language switching failed', 'param_error' => 'param error', ];