我现在正在研究一个类似的解决方案-该网站必须在所有URL中都有语言代码（默认语言除外），但只有页面可以通过WPML/Polylang插件的方式进行翻译。对于新闻（博客），我们只显示特定语言的帖子（它们是独立的，不是彼此的翻译）。所有其他内容以所有语言混合。此外，UI也以URL中的语言集显示。

下面是我为用语言代码预先编写重写规则所做的工作：

function prepend_default_rewrite_rules( $rules ) {

    // Prepare for new rules
    $new_rules = [];

    // Set up languages, except default one
    $language_slugs = [\'ar\', \'ku\'];

    // Generate language slug regex
    $languages_slug = \'(?:\' . implode( \'/|\', $language_slugs ) . \'/)?\';


    // Set up the list of rules that don\'t need to be prefixed
    $whitelist = [
        \'^wp-json/?$\',
        \'^wp-json/(.*)?\',
        \'^index.php/wp-json/?$\',
        \'^index.php/wp-json/(.*)?\'
    ];

    // Set up the new rule for home page
    $new_rules[\'(?:\' . implode( \'/|\', $language_slugs ) . \')/?$\'] = \'index.php\';

    // Loop through old rules and modify them
    foreach ( $rules as $key => $rule ) {

        // Re-add those whitelisted rules without modification
        if ( in_array( $key, $whitelist ) ) {

            $new_rules[ $key ] = $rule;

        // Update rules starting with ^ symbol
        } elseif ( substr( $key, 0, 1 ) === \'^\' ) { 

            $new_rules[ $languages_slug . substr( $key, 1 ) ] = $rule;


        // Update other rules
        } else {

            $new_rules[ $languages_slug . $key ] = $rule;

        }
    }


    // Return out new rules
    return $new_rules;
}
add_filter( \'rewrite_rules_array\', \'prepend_default_rewrite_rules\' );

P、 S：另外，我很高兴看到您的解决方案“我从URL检索值以确定语言/国家=完整”-这就是我目前正在研究的：）