aazzoma Interesting, and definitely something I'll need to look into.
I'm a little wary, though, because our Translate add-on is very finely tuned to the quirks of DeepL's XML interpretation.
The challenge with Translate is to maintain the formatting of the InDesign document as strictly as possible, and that requires jumping through a lot of hoops.
My suspicion is that a tool like ONE-API will not give us the control we need to maintain the formatting sufficiently.
But it's not something I was aware of previously, so I will look into it, and thank you for suggesting it!