The alternate languages links set in the page `<head>`
were not translated in each language, but within the language
the user is browsing the website.
This leaded to SEO referencing issues, as these links leaded
to (30x) redirections if followed, to translate the URL slug
within the new current language.
e.g.
`/fr_FR/shop/product/bose-mini-bluetooth-speaker-7`
automatically redirected to
`/fr_FR/shop/product/mini-haut-parleur-bluetooth-bose-7`
And it was the first link which was displayed as alternate link
when being in another language than French, while it should
be the second (to avoid the useless redirection).
opw-669979
Denis Ledoux
2ba7fa3c9d