Reloading the spellcheck dictionary

We have a requirement to allow our users to customize on demand the dictionary that the rte spellcheck plugin uses. We've already set up an administration page so that they can easily insert and remove words from the dictionary. This works well except that the changes only apply after the server is restarted. Is there any way we can hook into the process that loads the dictionary to trigger a reload without restarting the server?

Thanks