language files

Hey, I was just wondering which is the best/most efficient way of having language files for a site? eg: if $lang=english then it should include lang.en.inc.php if $lang=swedish then it should include lang.se.inc.php etc One way I did it before was to have an array like so: $lang_en[0]="Enter username"; $lang_en[1]="Enter password"; etc and then in the main php files I include the above language files and in the print/echo statements I echo $lang_en[x]. It works quite well but just looking at the code its quite easy to get confused because of all the $lang_en[x] statements...and you have to constantly check the language file and the array number to know whats where, I though of using short workds like $get_user="Enter your username:"; $get_pass="Enter your password:"; but then sooner or later you are going to use the same variable and overwrite what you wrote before if you are not careful..esp if you have a lot of text on your site...or a large site....which will produce some weird results till you notice your mistake... So.....how have you guys done it....or ....any advise on doing it? pointers? tips? ideas? Cheers, Ryan -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.9.4 - Release Date: 4/6/2005