Fetch all latest Wordpress posts when using Polylang plugin

functions.php

<?php
function get_default_language_posts($query)
{
    if ($query->is_main_query() && is_home() && function_exists('pll_languages_list') && !is_admin()) {
        $languages = pll_languages_list(array('hide_empty' => 1));
        $terms = get_terms('post_translations');
        $lang_default = pll_default_language();
        $lang_current = pll_current_language();
        $post_ids = array();

        foreach ($terms as $translation) {
            $transPost = unserialize($translation->description);
            if ($transPost[$lang_current] != 0) { //has no translation in $lang_current
                $post_ids[] = $transPost[$lang_default];
            }
        }

        if ($lang_default != $lang_current) { //without this check, default language returns zero posts
            $query->set('lang', join(',', $languages));
            $query->set('post__not_in', $post_ids);
        }
    }

    return $query;
}

add_filter('pre_get_posts', 'get_default_language_posts');

function get_latest_language_posts($atts)
{
    global $polylang;
    $output = '';
    $attributes = shortcode_atts(array(
        'number_of_posts' => 3
    ), $atts);

    foreach ($polylang->get_languages_list() as $term) {
        $langs[] = $term->slug;
    }

    $posts = get_posts(array(
        'post_type' => 'post',
        'lang' => implode(',', $langs),
        'showposts' => $attributes['number_of_posts']
    ));

    foreach ($posts as $post) : setup_postdata($post);
        $permalink = get_permalink($post);
        $output .= '<ul class="vm_latest_articles">';
        $output .= '<li>';
        $output .= "<a href='$permalink'>$post->post_title</a>";
        $output .= '</li>';
        $output .= '</ul>';
    endforeach;

    wp_reset_postdata();
    return $output;
}

add_shortcode('latest_posts', 'get_latest_language_posts');

add_filter('widget_text', 'shortcode_unautop');
add_filter('widget_text', 'do_shortcode'); // you can use this on widget as a shortcode

widget.txt

[latest_posts number_of_posts=4]