After I posted, I was doing more research, and already decided to add APL and Forth (the predecessor to Factor, IIRC), as well as SNOBOL. So, I'm now up to 15 languages on that list. :)
However, I have no intention of skipping COBOL, simply because being able to read COBOL source can be incredibly useful in maintaining or upgrading legacy systems.
As to TeX, I know it's for typesetting, and not coding...but I also happen to be a typesetter as well. ;)
At any rate, I'll make sure Lisp is high on the priorities!
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