Added. Please let me know if that works or breaks. Thanks for the feedback!
It's odd how you classify numerals as languages. Otherwise, great reference.
abacus-machine computingMachine -2700
babylonian-numerals numeralSystem -2000
roman-numerals numeralSystem -900
attic-numerals numeralSystem -600
greek-numerals numeralSystem -300
Thanks! I found that the development of numeral systems is in many ways similar to the development of programming languages, and the "story" is incomplete without including those in the db. It's a more recent development that I didn't expect.