The thing about translation, even a human translator will sometimes make silly mistakes unless they know the domain really well. So LLM are not any worse. Translation is a problem with no deterministic solution (rule-based translation had always been a bad joke). Properly implemented deterministic search/information retrieval, on the other hand, works extremely well. So well it doesn't really need any replacement - except when you also have some extra dynamics on top like "filtering SEO slop" - and that's not something LLMs can improve at all.