Disable automatic plugins translations by WordPress.org.

disable-translation-updates.php

<?php
/*
Plugin Name: Disable Translation Updates
Description: Disables automatic plugins translations by WordPress.org.
Author: wpdesk
License: GPLv2 or later
*/

add_filter( 'auto_update_translation', 'wpdesk_disable_translation_updates', 10, 2 );
/**
 * Disables automatic translations for plugins.
 *
 * @param  bool   $retval Whether to use automatic translations
 * @param  object $item   Update object. Do fine-grained checks against $item->type and $item->slug.
 * @return bool
 */
function wpdesk_disable_translation_updates( $retval, $item ) {
	// Add plugin slugs to suit your neeeds
	$plugins = array( 'wordpress-seo', 'buddypress' );
	
	if ( 'plugin' === $item->type && in_array( $item->slug, $plugins )  ) {
		return false;
	}
	return $retval;
}