languages.php

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<?php
$language = elgg_extract('language', $vars);

if (empty($language)) {
    // try to detect it
    preg_match("/\/js\/languages\/(.*?).js+/", current_page_url(), $matches);
    
    if (!empty($matches) && isset($matches[1])) {
        $language = $matches[1];
    }   
}

if (empty($language)) {
    // fallback to 'en'
    $language = 'en';
}

$all_translations = elgg_get_config('translations');
$translations = $all_translations['en'];

if ($language != 'en' && !isset($all_translations[$language])) {
    // try to reload missing translations
    reload_all_translations();
    $all_translations = elgg_get_config('translations');
}

if ($language != 'en' && isset($all_translations[$language])) {
    $translations = array_merge($translations, $all_translations[$language]);
}

?>
define(<?php echo json_encode($translations); ?>);