Thanks for the tip. I did not know MS WORD handles regex. That will be useful to "convert" spanish references to the american style (chapters separated by ":").
I wish tooltip tool (or eSword) handles the Spanish references in which chapters are separated by commas.
For example in MS excel you can set up the thousand separator for USA as "," but for latinamerica as the "." In a similar way, allowing the keep the Spanish format for bible references is ideal. It looks like eSword at the moment cannot handle that. For a "personal" project I certainly can convert to the american/English format. But for a third party organization I am dealing with, that option is not possible.