I understand almost no written Chinese. But my eyes and brain still pay attention to text in my environment in China. The result is that English text jumps out at me wherever there is any. English text appears even in places where there are few if any people who might be expected to read it. And since there are few if any people who do read it, getting it exactly correct is not a priority; thus it doesn’t tend to turn out exactly correct, though usually it’s clear what was meant, just from the context.
The fun is spotting surprises.
Surprises include signs that give instructions that I usually don’t see on signs; signs that are so badly translated that the meaning is totally lost; signs from The Department Of Signs That Say The Opposite Of What They Mean; signs that display lorem ipsum or other placeholder text; strange ways of writing familiar ideas; spellings that reveal how people write or pronounce English words when they don’t really know which letters and sounds should be there; and grammar, capitalization, and punctuation mistakes that highlight how difficult English is from the perspective of someone whose language follows different principles altogether.
(As you can see, much fun is also in the analysis!)
Meanwhile, English words on clothing can be surprising because they aren’t necessarily expected to mean anything at all! In the English-speaking world, my impression is, the people who create or wear clothing decorated with Asian writing are mainly anime/manga geeks who’d be likely to know what it says—although, to be fair, there are amusing corners of the internet dedicated to photos of mirrored, error-ridden, insulting, or nonsensical Asian-language tattoos, which you’d think people would be more careful with than clothing! But in Asia, many people wear stuff with English words on it, and even if they can read it, maybe they don’t always bother to: the English is just decoration.
Below are three samples of weird English: two safety stickers (those are almost always good for a laugh) and a garment featuring decorative (rather than correct) English.