google showing dead pages after i disabled languages in prestashop

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hi, help guys if possible please

i used to have a multilanguage website in prestashop, used to have 2 languages, english and french , so my domain was for english www.mobileleb.com/en and in french www.mobileleb.com/fr

due to problems related to redirection and site speed, i decided to keep only my english version so so website now will only work with english language which by default now is www.mobileleb.com (without /en)

everything worked great as its supposed to be, but the problem popped up with google who cached already mainly all our website, so whenever now i search for a product on my website from google or from any other seach engine, its already redirecting me to the old structure of url which was /en and therefore if u click on it, its a dead end, page 404, and the problem is that we cannot wait for google to crawl the site again maybe it takes ages, not to mention that the website is already running and have sales along with organic traffic, so we cannot loose clients when they find us on google search and click on an item to buy it only to find its a 404 page not found, any idea if prestashop can handle these urls automatically and redirect all pages that comes from search engines to their corresponding urls so we dont loose traffic and sales and dropping in seo of course