> It's literally unusable

It's not "literally unusable." Even for language pairs with poor translation, it considerably saves on manual translation time if you can have a translator look over sets of already translated (but lower-quality) sentences and correct those with errors.

Plus, there are actual studies out there comparing human translations to machine translations in a double-blinded evaluation by translators and the gap is not as high as your comment suggests.

For chinese-english (the other direction), bilingual evaluators have had difficulty differentiating between the machine translation and the human translation.