No, it means you will have to "You'll have to reinstall OSX" in order to repair your "Intel Mac based Snow Leopard" OS install. Monolingual only removes the PPC code, but this can cause problems when doing software updates and the only benefit is a minor space saving. It does not make code run any faster.
BTW Your thread title is very confusing, suggesting the thread is about a PPC computer when it is not. Changing it from "How to restore a PPC architecture?" to "How to restore after removing PPC architecture?" might get better results.
Also SNOW LEOPARD (Mac OS X 10.6) does not contain PPC code. Just a heads up, as you alluded to (whatever you call that way of phrasing of yours) to using "snowleopard".