Disable automatic translations by WordPress.org / GlotPress for BuddyPress.

bp-disable-translation.php

<?php
/*
Plugin Name: BP Disable Auto Translation
Description: Disables automatic translations by WordPress.org / GlotPress for BuddyPress.
Author: r-a-y
License: GPLv2 or later
*/

/**
 * Disables automatic translations for BuddyPress.
 *
 * @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 ray_disable_bp_auto_translation( $retval, $item ) {
	// disable automatic translations for BuddyPress
	if ( 'plugin' === $item->type && 'buddypress' === $item->slug ) {
		return false;
	}

	return $retval;
}
add_filter( 'auto_update_translation', 'ray_disable_bp_auto_translation', 10, 2 );

Great !