Yes As Grévisse said, Les mots n'existent pas. Fr absent and Eng 'absent' are faux amis. And 'he's on leave' doesn't suggest he's sick either! (at least, not in BE, though maybe in Canadian English) - 'on leave' suggests absence for leisure (e.g. annual holiday), or a longer leave of absence (e.g. sabbatical).
Originally Posted by Noego
Oh what a tangled web we weave
When first we practise to communicate
as Sir Walter Scott didn't quite put it! (Quote Details: Sir Walter Scott: Oh what a tangled... - The Quotations Page)