I had an options created with this:

acf_add_options_page(array(
    'page_title' => 'Settings',
    'post_id' => 'appearance',
    'menu_slug' => 'nf-appearance-settings',
    'parent_slug' => 'themes.php',
    'capability' => 'manage_options',
));

but calling get_field('footer_columns', 'appearance') wouldn't match to the translated version, and in wp-admin the content was the same regardless of what Polylang language was selected.

Main changes:

• fetch options page ids properly (function was returning their menu_slug's previously)
• call get_field() when fetching the default "All languages" version so that repeaters and stuff are parsed properly