Leanest way of going multilingual

[eluser]fedeisas[/eluser]
[quote author="n0xie" date="1286548314"]I found this to be the easiest to use when dealing with multiple languages: http://maestric.com/doc/php/codeigniter_i18n[/quote]

I've also used this library and it rocks! Altough, you'll have to write some routes for your controllers. I mean:

$route['(:any)/busqueda/productos/(.+)$'] = "search/products/$1";
$route['(:any)/search/products/(.+)$'] = "search/products/$1";

To avoid doing this, some folks use some urls like this:
www.example.com/buscar/productos/computadores/sp-1
www.example.com/search/products/computers/sp-1

And the real WORKING part of the url, is the last segment. So, their controller get the last segment and SP-1 stands for Search Product with ID = 1.
This unorthodox method works right when you need multilingual URLs.

Although I'm not really sure how this pretty URLs impact on SEO rankings.

Good Luck