How to substitute different pages in different languages?

Question

WordPress

How can I make it load different files on different pages?

<?php
$locale = get_locale();
if($locale == 'pl_PL'){
    $download_text = 'Pobierz<br>katalog ';
  $link_catalog = 'pll_get_post(2341)';
}else if($locale == 'lt_LT'){
    $download_text = 'Parsisiųsti<br>katalogą';
  $link_catalog = 'pll_get_post(2339)';
}else{
    $download_text = 'Download<br>catalog';
  $link_catalog = 'pll_get_post(14)';
}?>
<div class="catalog-file">
    <a href="<?=get_field('catalog-file', pll_get_post(2341));?>" download title="catalog file">
        <span><?=$download_text;?></span>
    </a>
</div>

Answer 1

I wouldn't bother uploading catalog files in media at all. I doubt that someone will ever change them, so I would put them in the data folder in the theme as is, but you can always adapt the example below for yourself

if ( is_plugin_active( 'polylang/polylang.php' )  ) {
  $locale = get_locale();
  $data = [
    'pl_PL' => [
      'text' => 'Pobierz<br>katalog',
      'file' => 'price-pl.xlsx',
    ],
    'lt_LT' => [
      'text' => 'Parsisiųsti<br>katalogą',
      'file' => 'price-lt.xlsx',
    ],
    'en_US' => [
      'text' => 'Download<br>catalog',
      'file' => 'price-en.xlsx',
    ],
  ];

  echo '<div class="catalog-file">';
     echo '<a href="' . get_stylesheet_directory_uri() . '/data/' . $data[$locale]['file'] . '" download="' . $data[$locale]['file'] . '">' . $data[$locale]['text'] . '</a>';
  echo '</div>';
}

PS Before outputting a file, it is appropriate to check for its existence

if ( file_exists( $file ) && filesize( $file ) > 0  ) {
  // выводим, если существует
}