IRC the representation of numbers was discussed. It turns out that numbers are not really considered in MediaWiki. When you want to express a number it is expected that you use Arabic numerals.
When other numerals are in use for a language, the trick is to change the CSS to replace the characters. The problem is how to turn this off for the article on numerals..
OmegaWiki has a nice way of annotating the different expressions for a number.. It is defined on the number class. The only thing left is learning in how many ways a number like two can be expressed.