Cache & Multi-domains

[eluser]TheFuzzy0ne[/eluser]
Welcome to the CodeIgniter forums!

The '.' in your regular expressions need escaping:

Code:

if (preg_match('#my_site\.fr#i', $_SERVER['HTTP_HOST'])) {

I would suggest that you use strpos instead:

Code:

if (strpos($_SERVER['HTTP_HOST'], 'my_site.fr') !== FALSE) {

However, I'm not sure that this is your problem.

Where are you loading your language files? Have you made sure your cache directory is writable?

I would suggest you get it working correctly without caching, and then you can start caching things.