I have a similar question. It appears to me that the “ical import month’s events” actually refers to the export of an .ics file which can then be imported into Google calendar. This then is a generic icalendar file, not specific to Apple’s “iCal.”
Is there a file where the button text resides and can be changed to something more descriptive — i.e., “Export to icalendar file” — or is the button simply an image that must be replaced with another image (and if so, where does that image live?)