I assume a plugin for whole PDFs would have to use something like Google Translate API, which is online and isn't free. https://cloud.google.com/translate
I use the Google Translate website for PDFs, which works passably well for a free service. But it only allows PDFs up to 10mb and 300 pages (I haven't found other free translation services that allow more). I spend a fair amount of time splitting or size-reducing PDFs to get them under 10mb (using other tools), then having Google translate each file, then re-joining them. Google Translate makes a mess of fonts and text layout in many scientific documents. It particularly makes a mess of equations.
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https://cloud.google.com/translate
I use the Google Translate website for PDFs, which works passably well for a free service. But it only allows PDFs up to 10mb and 300 pages (I haven't found other free translation services that allow more). I spend a fair amount of time splitting or size-reducing PDFs to get them under 10mb (using other tools), then having Google translate each file, then re-joining them. Google Translate makes a mess of fonts and text layout in many scientific documents. It particularly makes a mess of equations.