RewriteEngine On
RewriteBase /
RewriteCond $1 !^frontlinetouch/
RewriteCond %{HTTP_HOST} ^www\.frontlinetouch.pagecomingsoon\.co.uk
RewriteRule (.*) /frontlinetouch/$1 [L]
# The Friendly URLs part
# redirect all requests to /de/favicon.ico and /nl/favicon.ico
# to /favicon.ico
#RewriteCond %{HTTP_HOST} ^www\.frontline.pagecomingsoon\.co.uk
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(en|zh)/favicon.ico$ favicon.ico [L,QSA]
# redirect all requests to /de/assets* and /nl/assets* to /assets*
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(en|zh)/assets(.*)$ assets$2 [L,QSA]
# redirect all other requests to /de/* and /nl/*
# to index.php and set the cultureKey parameter
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(en|zh)?/?(.*)$ index.php?cultureKey=$1&q=$2 [L,QSA]
RewriteEngine On
RewriteBase /
# Redirect non-www urls to www
#RewriteEngine on
RewriteCond %{HTTP_HOST} ^frontlinetouch.pagecomingsoon\.co.uk [NC]
RewriteRule (.*) http://www.frontlinetouch.pagecomingsoon.co.uk/$1 [R=301,L]
This question has been answered by b0b0b0. See the first response.