Translating an app does not make it findable in another language. Search engines index URLs, not sessions, so a Spanish version that only exists behind a cookie or an Accept-Language header is, to a crawler, the English site again.
This category covers the work that makes translations rank: giving every language its own URL, declaring the relationships with hreflang, choosing between subdirectories, subdomains and country domains, and avoiding the redirects and switchers that hide a locale from crawlers. Each article shows the Laravel routing, middleware or Blade that implements it.
Where search engines differ or the documentation leaves room for judgment, the articles say so instead of presenting one answer as settled.