如何将翻译添加到opencart文本字符串？

Question

I'm using Opencart v2.3.0.2. Need help in how to translate some text strings. I've added some links to my header menu (in /catalog/view/theme/mytheme/template/common/header.tpl) using code :

<ul class="static_links">
  <li class="head-links">
    <a href="<?php echo $about_products; ?>">
      <?php echo $text_products; ?>
    </a>
  </li>
  <li class="head-links">
    <a href="<?php echo $contact; ?>">
      <?php echo $text_novosti; ?>
    </a>
  </li>
  <li class="head-links">
    <a href="<?php echo $contact; ?>">
      <?php echo $text_onas; ?>
    </a>
  </li>
</ul>

Also I've added new strings and translations in footer.php (/catalog/language/ru-ru/common/footer.php):

$_['text_products'] = 'О продуктах'; $_['$text_novosti'] = 'Новости'; $_['$text_onas'] = 'О нас';

Finally I've registered that translations in header.php (/catalog/controller/common/header.php):

//New links in menu
$data['text_products']  = $this->language->get('text_products');
$data['text_novosti']  = $this->language->get('text_novosti');        
$data['text_onas']  = $this->language->get('text_onas');

After all when I open page with menu it shows only translation texts for $text_products. In other places it shows only value text_novosti and text_onas. But in should show translations from footer.php instead.

Please help me, how to display translations correctly?

Or maybe there is a way to hardcode texts based on language? Something like:

<?php if ($lang='en') {?> <a href="#">News</a><a href="#">About us</a>
<?php } ?>

НовостиО нас

Answer 1

If you want to use your strings in header.tpl, then you must add your strings to:

catalog/language/ru-ru/common/header.php

not to:

catalog/language/ru-ru/common/footer.php

If you want to hardcode, in header.php add:

$data['lang_id'] = $this->config->get('config_language_id');

And in header.tpl:

<?php if ($lang_id == 1) {?>
    <a href="#">News</a>
    <a href="#">About us</a>
<?php } else if ($lang_id == 2) {?>
    <a href="#">Новости</a>
    <a href="#">О нас</a>
<?php } ?>