I once had some programming languages listed on my resume that I didn't substantiate there. The actual meaning of that was "this resume will overflow one or two pages if I list everything I ever did to know every language I know."
Length isn't that big a deal these days, and there isn't a need to write down every single language, framework and library you have ever written hello world in. If you listed 100 items there is no way you are proficient at all of them right now. The highlights will fit in a line or two.
Now I have LinkedIn for that.