I don't believe the technology could be used by just anyone because of the need to train the machine. That being said, it is possible to supply the system in a particular field and to provide this in a box. So it might be possible to have a legal translator in a box, another translator in a box for the airlines and a medical translator in a box. That would be possible, but it would not be possible for the basic technology.
You also have to understand something else. In translation companies, work that has previously been done represents an enormous amount of value for those businesses. That's where their intellectual capital lies. To be able to train a translation system using those documents gives them a lot of value. They are not particularly interested in sharing past work. That would be like giving their competitors access to their own translations.