Re: Doing journalism…
There isn't ironclad metrics on how many or which translation firms use software. Evidence I provide will be anecdotal. Remember that I said "many", not "all".
One basis is friends I have who do translation work. From their reports, the most common way they are asked to do them is to receive a machine-translated version along with the original and be asked to correct it. This probably saves them time and, for many documents, produces something of acceptable quality, but if the machine translation goes far off the rails, it can be a problem.
Other reports are from people who wanted software localization, hired a company to do it, and got customer complaints. In one case, it was software I worked on which hired a firm to do localization, and it was a language I spoke. On receiving a bug report which we couldn't reproduce, we decided it might only affect a certain translation, and only I spoke that language. I had never used the localization before, though, and when verifying the bug, I found many inaccurate translations. This is likely because machine translation is less accurate when the phrases to be translated are small chunks from a UI.
Unfortunately, there are some businesses that have realized that they can advertise translation work without having to do it by hand. There are many reputable ones out there, but the problem is that most people hiring one haven't done it before so don't have a way to assess their reputation and they probably don't speak the languages they're having translated, so checking the work of the one they picked is difficult. The easiest way to test is to give them a document you already have the translation of, but that's also the easiest thing for them to use a tool to do.