I've checked all subpages but I don't think there is any answer to this question: how are you going to include a machine translation service in this product? There are only some incidental mentions of this, one is «Example task: Contact yandex and get the translation for one or more segments-depending on provider capacity». So there will be server-side requests to proprietary services, with a fee paid by the Wikimedia Foundation? I don't understand, if this wasn't possible for Translate on Meta-Wiki etc. how/why is it going to be possible here?
If machine translation is not a big component of this project forgive me for the silly question, but update Thread:Talk:Content translation/Machine translation.