是的，有点像。任何本地化插件（如WP Members）都会脱离WordPress设置的“语言环境”。可以使用locale 滤器但也可以使用plugin_locale

请参见：https://developer.wordpress.org/reference/hooks/plugin_locale/

使用plugin_locale 特定于插件*的文本域（在本例中为“wp members”）

add_filter( \'plugin_locale\', \'my_plugin_locale_filter\', 10, 2 );
function my_plugin_locale_filter( $locale, $domain ) {

    // If the text domain is \'wp-members\'
    if ( \'wp-members\' == $domain ) {
        /*
         * This logic adapted from the method you referenced at
         * http://beta.beantin.se/wordpress-setting-language-individual-pages/
         * Note that the function get_top_parent_page_id() from that example
         * is used here, and the logic is not adapted to your specific 
         * question (i.e. I assume the default $postLanguage value is
         * Norwegian in your case and you are switching it to English) so 
         * change this to match what you are doing with the other elements
         * being used from that process.
         */
        $postLanguage = "en-GB";
        if (is_page()) {
                $svPageID = get_top_parent_page_id(); // ID of parent page
                if ($svPageID == "565") { // ID of the "på svenska" page
                    $postLanguage = "sv";    
                }
            $locale = $postLanguage;
        }
    }

    // Always return the value being filtered.
    return $locale;
}

*任何插件的文本域都应在插件主文件的标题中注明。例如，如果打开wp成员。php并查看插件标题，您将在标题“文本域：”下找到它。