Utah is no different. Why is it highlighted?
As others have mentioned: Montana is Spainish, Georgia, Louisiana (Louis XIV), Alaska, and Texas aren't, etc.
And if the "trend might have continued," then where did it start here? Louisiana was named before the 1800's, it's the (very small) rump of the Louisiana Territory. Georgia was named in the 1730's, Florida was named in 1521. California was not going to be changed from California (the Spainish name) when America won the Mexican-American War, or when they became a state just a few years later. If most states were named for Europeans or Indian tribes, then there's some serious problems. By the way, where are the European names, anyway?