It sounds so simple, doesn’t it?
You have some words in Language A which are in dire and immediate need of being seamlessly transformed into Language B. Perhaps it’s a website, or an Annual Report. A birth certificate or an academic paper. A legal document or a love letter.
And your priorities are quite clear: fast, perfect and, most importantly, cheap. Received wisdom, however, holds that you can have one, maybe two, of those qualities, but never, ever, all three.