While I'm fluent in English, there was a time when I still don't 100% "get" the English language and don't fully understand Western/American culture.
Like how I watch some shows and they have that thing about girl scouts selling cookies, people wearing costumes for Halloween and so on.
I was kinda young when I first came across Power Rangers media (coloring books, comics and toys) and for a short time, I seriously thought that these are heroes that take morphine... like this is another "American culture" thing I don't know about...
It was a little while later when I realized that "Morphin'" was just a cool way of saying "morphing", as in "metamorphosis".