Commercial translator services lately are the worst they have ever been. You cant validate that they aren't directly sending your excel with the translation lines into a LLM with no tweaking/checking.

For a indie videogame i work on, we tried a couple translation agencies, and they gave terrible output. At the end, we built our own LLM based agentic translation, with lots of customization for our specific project like building a prompt based on where the menu/string is at, shared glossary, and other features. Testing this against the agencies, it was better because we could customize it for the needs of our specific game.

Even then, at the end of the day, we went with freelancers for some of the languages as we couldn't really validate the AI output on those languages.The freelancers took a month to do the translation vs the 2-3 days we ourselves took for the languages we knew and we could monitor the AI output. But they did a nice job, much better than the agencies.

I feel that what AI really completely kills is those translation services. Its not hard at all to build or customize your own AI system, so if the agency is going to charge you considerable money for AI output, just do it yourself and get a better result. Meanwhile those freelancers are still in demand as they can actually check the project and understand it for a nice translation, unlike the mechanical agencies where you send them the excel and they send it to who knows what or an AI without you being able to check.

I will likely be opensourcing this customizable AI translation system for my project soon.