Use chatgpt or deepl. They're much better than Google Translate, especially if you specify the context.

Machine-created translations are bad. They've become better over time, but they're still bad. If you've ever tried having your native language butchered in the way that machine-created translations butcher my native language on the daily, you'd understand why. I suspect a lot of the push for machine translations comes from monolingual developers in Silicon Valley.

> It makes no sense to bother individual translators with such a miniscule job

You're not bothering them if you're paying for the job. On your part, all you need to do is to set up a web-based interface that makes it easy and fast for them to log in and add the translations.

TL;DR There are services that specialize in translating small phrases / paragraphs. Search tattoo translator services (but vet properly, there are fake ones too)

I found a few services while looking for a proper translator to turn a small phrase into Old Latin. I can't remember the services now (it was long ago) but there are professional translators, historians and college professors who moonlight on these sites doing small translations for a small fee. Some offer bulk translations of small phrases. One of the translators I got was a professor in classical text/literature/language (can't remember exactly) and another was some professor of ancient/classical history. The translations came back similar but worded a bit different because there was no way to do a 1 to 1 translation and they provided options for sightly different variants.