English is my first and only language and I still need to reference a dictionary when reading, you can be fluent but still need a reference.

"When I speak English, though, I never need a dictionary."

You make a staggering number of syntax errors, grammar errors, and use a huge number of poorly defined referents that only work because your listeners are human-intelligent agents who can work it out from immense piles of context and cognition. That's not an attack; I do too. Everyone does.

If computers were smart enough to deal with "I need a windowing umm umm thingy yeah like a window but with a title bar that said uhh my name uh then uh uh then make it really ummm big like fulling on uh up the screen", we'd probably be able to program for longer without Stack Overflow too. :)

That's a very true. Thanks for the response!

The question didn't define "fluently" as "never needing to look anything up." I think the concept of fluency (of any kind of language) is being able to use it without significant effort. e.g. I would consider myself "fluent" in Java, but not Lua - that doesn't mean when I write Java I never have to look anything up, but certainly far less so than hypothetically writing the same thing in Lua.