And it's not like they're difficult words no one would notice: Welcome spelled without the final e, Bela Lugosi spelled with an extra e on the end (hey, maybe the were painted side by side? Nah), and Hires Root Beer spelled Hiers.
Come on, people, take a little pride in your work. If you were unsure of whether to use baking soda or baking powder in the dish you were cooking, you'd check the recipe, right? Well, if you're using words in your painting, how hard is it, really, to type them into a search engine, or open a dictionary?