<form action="get">
    <select class="form-control languageInput" name="language">
        <?php foreach ($this->getTranslator()->getLocaleList() as $key => $value): ?>
            <?php $sel = ''; ?>
            <?php if ($this->get('language') == $key): ?>
                <?php $sel = 'selected="selected"'; ?>
            <?php endif; ?>

            <option <?=$sel ?> value="<?=$key ?>"><?=$this->escape($value) ?></option>
        <?php endforeach; ?>
    </select>
</form>

<script>
$('.languageInput').change (
    this,
    function () {
        top.location.href = '<?=$this->escape($this->getCurrentUrl(['language' => '__LANG_PLACEHOLDER__'], false)); ?>'
                .replace('__LANG_PLACEHOLDER__', $(this).val());
    }
);
</script>
