Yes.
The button text is editable in the value. So for example
<input type="submit" name="eCart1_Continue_100" id="eCart1_Continue_100" value="Continue Shopping" class="ImpressionsInspiration2" />
could be changed to
<input type="submit" name="eCart1_Continue_100" id="eCart1_Continue_100" value="Submit" class="ImpressionsInspiration2" />
Hope this helps...I think its a nice, user friendly extension.
johna1964