Earlier quoted context omitted.
I don’t think that’s what is happening here. The suit seems to be predicated on him calling himself an engineer
Where I live, people call themselves engineers all of the time, and it's not considered to imply any particular license or degree or accreditation.
Which sucks, doesn't it. It's advertising (ie. a lie) that's been repeated so much that it's become accepted.
I know many software "engineers". They aren't real engineers, they just didn't like being called software programmers or coders.