I created a small test script at http://nds.wikipedia.org/wiki/Bruker:Slomox/vector2.js. Works well to Cyrillize nds.wp ;-) (or any other wiki). It only supports reading so far, editing will be harder. The problem will be cases like a Romanian article written in Latin script and containing Cyrillic characters on purpose (like http://ro.wikipedia.org/wiki/Moscova). The word "Москва́ " in the first line would be latinized when a Cyrillic user edits it. Hard to fix it without escaping (which is done with -{ ... }- syntax in conversion wikis like zh or sr). But with escaping we are again at imposing stuff on ro.wp. Cyrillic users could escape strings in the edit window which would be removed on save, but that of course means escaping on every edit. On the other hand Javascript-based escaping could lead to increased revert quotas if Cyrillic users forget to Javascript-escape strings. Well, that's all theory as long as there are no active Transnistrians editors...
Marcus Buck User:Slomox