Add Indonesia Language

Hi @riomastri

we couldn’t add every language. But you can add “Indonesian” via filter, documented here:
https://antispambee.pluginkollektiv.org/documentation/#ab_get_allowed_translate_languages

add_filter( 'ab_get_allowed_translate_languages', function( $languages ) {
  $languages['id'] = 'Indonesian';
  return $languages;
});

This code could be added via functions.php (if you use a child theme or your own made theme), via functionality plugin or with a code snippet plugin like:
https://ww.wp.xz.cn/plugins/code-snippets/

All the best
Torsten