localization issue

Sorry, but Codeigniter have a specific folder called language for translate multilangual sites. Why i should use a mySQL table for to do this?

Well, If you think like that, it looks you have a long way to produce a larger scale project.

Language folder is for texts, not for your algorithms. In order to set the correct relational structure and algorithm you will need a very basic and solid branch to grasp, to connect/join everything in a clear way. So, a language column on your table will save your life and will make everything easier.

+

On your that ,mutual, product page, let's imagine a title of a part with if:

PHP Code:

<?php if($lang == 'en'){
  echo 'Categories';
}else if ($lang == 'it'){
 echo 'Categorie';
}else if ($lang == 'de'){
  echo 'Kategorien';
} //etc..
?>

but with language file you can only write :

PHP Code:

<?php echo lang('MyLangFile.catPartTitle');?>

that's all and clear again.
cordiali saluti