Fetch all latest Wordpress posts when using Polylang plugin

README

[latest_posts]
OR
[latest_posts number_of_posts=3]
OR
[latest_posts number_of_posts=3 language=en]

functions.php

<?php

function get_latest_language_posts ($atts)
{
    $attributes = shortcode_atts ([
        'number_of_posts'   => 3,
        'language'          => pll_current_language()
    ], $atts);

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

    foreach ($posts as $article) :
        $image = get_the_post_thumbnail($article->ID);
        set_query_var ('article', $article);
        set_query_var ('image', $image);
        get_template_part ('posts-preview');
    endforeach;

    wp_reset_postdata();
    return '';
}
add_shortcode('latest_posts', 'get_latest_language_posts');

posts-preview.php

<a href="<?php echo get_permalink($article); ?>"><?php echo $article->post_title; ?></a>