Roope

Hello adrianmak!
  How do you handle passing values to the PayPal checkout? Maybe you'll need something like this: if($user->language->isDefault()) {    $value = $page->fieldname; } else {    $value = $page->getLanguageValue($user->language, 'fieldname'); }

For prices I would suggest to go with float input and then modify the output when ever needed. Text field for numeric data is not the sharpest solution. With float you can be sure that data is always numeric only, can have decimals and calculations with PHP work without hassle. For output you can use some basic function like this:
function price($float) { return number_format($float, 2, ',', '') . "€"; } If you need to add taxes it's also easy extend to the output function:
function price($float, $tax=null) { if($tax) $float = $float * ((int) $tax / 100 + 1); return number_format($float, 2, ',', '') . "€"; }

I think that it has something to do with (page name) language support. Now your search form points to http://creacc.espaceproduction.com/rechercher/ but because of lang support page actually lives in lang prefixed url http://creacc.espaceproduction.com/fr/rechercher/. Now PW does redirect and thus loses the search query.   You could try something like this: <form id='search_form' action='<?php echo $pages->get("/rechercher/")->url; ?>' method='get'> <input type='text' name='q' id='search_query' value='<?php echo htmlentities($input->whitelist('q'), ENT_QUOTES, 'UTF-8'); ?>' /> <button type='submit' id='search_submit'>Rechercher</button> </form>