Incorrect canonical implementation: Ensure that the canonical URL is suitable and isn't going to conflict with hreflang directives. Picture you may have an e-commerce website that’s available to end users in Canada in each English and French. You want to make certain that engines like google serve the proper language https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/30904--hreflang-seo.html