is there a posibility to give the labels in the menu or for example the name in the main.php special characters? I’m from Germany and had to know this.
Usually in your webroot folder. Note that .htaccess files are an Apache specific feature, that allows for custom settings per directory. It’s not guaranteed to work on all setups by default.
Check the Apache documentation to find out more. There are too many configuration options for Apache, so we can’t go into detail here.