I don't have a Nikon EULA handy - have you heard anything about that
or is it bull****?

1. I have no idea what an EULA is.

2. If you look at the statement that you are reciting at its face, there is
no way it could be taken seriously. Look at all the professional
photographers that shoot with Nikon digital gear. Do you think, even for a
moment, that they would allow the intellectual rights to their work be
compromised in any way? I don't think so. The pro community is and always
has been Nikon's bread and butter. I really don't think Nikon would be so
stupid as to try and **** where it eats. Maybe Snopes has the answer you
seek, but I don't give the issue enough credibility to warrant spending any
of my time checking it out.

As to the Navajo issue, I've spent quite a bit of time on the Navajo
reservation, and I've never once seen the Navaho spelling used there. Which
is a bit different than the spelling of Mohave. In Arizona, Mohave is
always spelled with an "h", but in California, it is always spelled Mojave
with a "j". Go figure.