I've ended up doing a lot of research into LLM translation, because my language learning tool (https://nuenki.app) uses it a lot.

I built something kinda similar, and made it open source. It picks the top x models based on my research, translates with them, then has a final judge model critique, compare, and synthesise a combined best translation. You can try it at https://nuenki.app/translator if you're interested, and my data is at https://nuenki.app/blog