<link rel="alternate" hreflang="x-default" href="{{ canonical_url | replace: shop.domain, 'www.mystore.com' }}" />
<link rel="alternate" href="{{ canonical_url | replace: shop.domain, 'www.mystore.com' }}" hreflang="en-GB" />
<link rel="alternate" href="{{ canonical_url | replace: shop.domain, 'www.us.mystore.com' }}" hreflang="en-US" />
<link rel="alternate" href="{{ canonical_url | replace: shop.domain, 'www.mystore.com' }}" hreflang="en" />