当前情况：

我已经有一个WordPress的安装在http://example.com和这个网站是多语言，所以你可以访问一个英语网页在http://example.com/en/something-here/，你可以访问这个网页的西班牙语版本的http://example.com/es/algo-aqui/。

我尝试做的是：

我想在http://example.com/software/中安装Codeigniter 4，但我想保持一般的网站URL结构，所以我需要能够通过URL http://example.com/en/software/和http://example.com/es/software/访问CI4软件。始终阅读本段开头提到的相同CI4安装。

我已经尝试过的：

我在http://example.com/software/上部署了CI4文件，并修改了WordPress站点和Code Igniter的.htaccess文件。
这是我的WP .htaccess文件在根目录：

# Disable directory browsing
Options All -Indexes

<IfModule mod_rewrite.c>
RewriteEngine On
    RewriteBase /
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^[a-z]{2}/software(.*)$ /software/index.php$2 [L]
</IfModule>

# BEGIN WordPress
# Las directivas (líneas) entre `BEGIN WordPress` y `END WordPress` se generan dinámicamente
# , y solo se deberían modificar mediante filtros de WordPress.
# Cualquier cambio en las directivas que hay entre esos marcadores se sobreescribirán.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

这是我在“software”目录下的.htaccess文件：

# Disable directory browsing
Options All -Indexes

# ----------------------------------------------------------------------
# Rewrite engine
# ----------------------------------------------------------------------

# Turning on the rewrite engine is necessary for the following rules and features.
# FollowSymLinks must be enabled for this to work.
<IfModule mod_rewrite.c>
    Options +FollowSymlinks
    RewriteEngine On

    # If you installed CodeIgniter in a subfolder, you will need to
    # change the following line to match the subfolder you need.
    # http://httpd.apache.org/docs/current/mod/mod_rewrite.html#rewritebase
    RewriteBase /

    # Redirect Trailing Slashes...
    RewriteCond %{REQUEST_FILENAME} !-d
        RewriteRule ^(.*)/$ /$1 [L,R=301]

    # Rewrite "www.example.com -> example.com"
    RewriteCond %{HTTPS} !=on
    RewriteCond %{HTTP_HOST} ^www\.(.+)$ [NC]
    RewriteRule ^ http://%1%{REQUEST_URI} [R=301,L]

    # Checks to see if the user is attempting to access a valid file,
    # such as an image or css document, if this isn't true it sends the
    # request to the front controller, index.php
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule (.*) /software/index.php/$1

    # Ensure Authorization header is passed along
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
</IfModule>

<IfModule !mod_rewrite.c>
    # If we don't have mod_rewrite installed, all 404's
    # can be sent to index.php, and everything works as normal.
    ErrorDocument 404 index.php
</IfModule>

# Disable server signature start
    ServerSignature Off
# Disable server signature end

我得到的错误：

我可以访问这两个，网站和软件。网站运行良好，但当我尝试访问，比方说http://example.com/en/software/，我得到一个404错误，当我访问Codeigniter。错误消息说：“找不到控制器或其方法：应用程序\控制器\En：：软件”。
这就好像CI试图找到控制器En（不存在）和方法software。
任何帮助都将不胜感激。