How to perform a WP_Query with current language?

I was expecting that this was asked before, but I couldn’t find any support requests regarding this (probably worth mentioning in your FAQ).

I have a function in which I’m performing a WP_Query to list all events. Events are a post_type used by a event plugin. This is what the query looks like:

$args = array(
    'post_type' => 'event',
    'lang' => pll_current_language(),
    'showposts' => $amount,
    // 'category_name' => $slug,
    'post__not_in' => get_option( 'sticky_posts' )
    );
$query = new WP_Query( $args );

However, this does not respect the current language and lists all the events, ultimately appearing like duplicates. What am I doing wrong?

Edit: I’m using a static frontpage

https://wordpress.org/plugins/polylang/