You specify the first URL as the search engine can have problems pinpointing which 1 should be the main URL.  The next tutorial will provide you with the best way to empower Canonical URLs in Prestashop 1.five. The JS redirect looks like a little bit of a messy predicament, https://free-bookmarking.com/story18840220/a-review-of-automatyczne-tagi-hreflang-i-tagi-kanoniczne-seo