Sort an array when the first letter has accents

I am ordering an array to display a multiselect, but when I change the system language I have some labels that have accentuation in their first letter, by undoing my array and entering the words that have accentuation to the end of the list. >

I got the example below that solved me, IN PARTS! How do I work with Postgree, SQLServer and Oracle my charset changes according to the database / client. So making my array clutter again.

I can not get it to be "UTF-8" and "ASCII" functional at the same time.

Can anyone help me resolve to sort this array independent of charset encoding? My result is as below, Index 3 is going to the end of the array.

Result:

[1] => AMDEC
[11] => Audit 
[8] => Compétence
[13] => Contrôle
[6] => Incident
[9] => Inspection
[2] => MSP
[4] => Performance
[0] => Plan d´action
[7] => Problème
[10] => Questionnaire
[12] => Risque
[14] => Test
[15] => Traitement
[5] => Workflow
[3] => Étalonnage'

uasort($termos, "arrayOrdenation");


function arrayOrdenation($name1, $name2){   

    $patterns = array(
        'a' => '(á|à|â|ä|Á|À|Â|Ä)',
        'e' => '(é|è|ê|ë|É|È|Ê|Ë)',
        'i' => '(í|ì|î|ï|Í|Ì|Î|Ï)',
        'o' => '(ó|ò|ô|ö|Ó|Ò|Ô|Ö)',
        'u' => '(ú|ù|û|ü|Ú|Ù|Û|Ü)'
    );          

    $name1 = preg_replace(array_values($patterns), array_keys($patterns), $name1);        
    $name2 = preg_replace(array_values($patterns), array_keys($patterns), $name2);          

    return strcasecmp($name1, $name2);
}