Problems with displaying system messages in joomla 3?

Question

Joomla

I deduce by means of a standard output of messages, messages on errors of registration. Out of the box, joomla uses a version of bootstrap that doesn't match my site. In the p file I mаssage.phwrote a crutch with switch(), this is what happened:

<div id="system-message-container">
<?php if (is_array($msgList) && !empty($msgList)) : ?>
    <div id="system-message">
        <?php foreach ($msgList as $type => $msgs) : ?>
            <?php switch ($type) :
                case 'message': 
                    $type = 'success';
                break;
                case 'error': 
                    $type = 'warning';
                break;
                default:
                break;
            endswitch;?>
                <div class="alert alert-<?php echo $type;?> alert-dismissible fade in">
                <?php // This requires JS so we should add it through JS. Progressive enhancement and stuff. ?>
                <a class="close" data-dismiss="alert">×</a>

                <?php if (!empty($msgs)) : ?>
                    <h4 class="alert-heading"><?php echo JText::_($type); ?></h4>
                    <div>
                        <?php foreach ($msgs as $msg) : ?>
                            <div class="alert-message"><?php echo $msg; ?></div>
                        <?php endforeach; ?>
                    </div>
                <?php endif; ?>
            </div>
        <?php endforeach; ?>
    </div>
<?php endif; ?>

The problem is that the heading for alert when $type = successdisplays success, but for $type = errorWarning. I thought that the problem was with the translation, I searched, I did not find it. Translation using JText (), but in which file it looks for values, I can’t understand.