I am normally rather mellow when it comes to stuff like this. You know, people saying "hola" and "buenas noches" are grammatically proper and used in the correct context.
However, there are some that just don't fly. Yes, I know that adding an "o" makes things sound Spanish (or so the general consensus tells me), and I can even appreciate it in a comedic context (sit-o on the chair-o next to the table-o). However, "no problemo" crosses the line.
As a Spanish speaker myself, that's the one that irks me the most, so a poster is in order. Spanish speakers will respect you more when you use their language properly, as opposed to destroying it in an effort to sound cool.
As far as the design goes (is there even a design here?), this is the last one of the kind that I produce. I've used the same style in a few others and I think it's run its course. Next time, I'll try something different.
PS: Natzee is spelled like that on purpose. I can't believe how many people have pointed out over the years that I misspelled the word "Nazi."