@herko

There is a setAttributeNames method in Validator. Simple usage:

$validator = Validator::make(Input::all(), $rules);
$validator->setAttributeNames(array(
    'name' => 'Category',
));

Create a new file as app/lang/en/attributes.php. For example

return array(

	'category' => array(
        'name' => 'Category',
        'type' => 'Type'
	),
	'product' => array(
        'name' => 'Product',
        'quantity' => 'Quantity'
	)

);

create a copy of it for every language and edit contents:

app/lang/fr/attributes.php, app/lang/de/attributes.php ...

and use it with your validator:

// Category validator
// If app locale is fr, it will look for app/lang/fr/attributes.php
$validator->setAttributeNames(Lang::get('attributes.category'));

// Product validator
$validator->setAttributeNames(Lang::get('attributes.product'));