On line 937 in altlist.php you have
if($r_prof['skill_name'] == 'Riding')
Or, is is a hard-coded English text.
In frFR.php we have somting like :
// Riding Skill Icons-Array
$wordings['frFR']['riding'] = 'Monte';
When I hardcode the word 'Monte' in your altlist.php file, then all is well (the icon shows in the skill line).
Wouldn't it be bether if there was something like :
if($r_prof['skill_name'] == $wordings[$row['clientLocale']]['riding'])
(this actullay worked - no more hardcoding - but is 'solution' ok?).