Thanks Xiurell, I think that was part of my assumption, but sometimes it can be hard to say the simplest thingsSo thanks again for such a complete explanation, and especially about the old Spanish.
As for written spelling, I've seen Texas written as Tejas very often, but usually in Texas or near the border. But again it's usually informal, and mostly in music or maybe advertisements. Actually, to me, it seems to confuse a very simple thing.