Yeah you're parser is too broken to be useful. For example with this header, listing English and French in that order, even explicitly indicating a bad quality

Yeah you're parser is too broken to be useful. For example with this header, listing English and French in that order, even explicitly indicating a bad quality value for French: Accept-Language: en-US;q=1.0, en;q=1.0, fr-FR;q=0.5, fr;q=0.5 your website redirects to faut-il-https-sur-mon-site.fr. Turn this off.