Thanks to ashikase, I found an easy way to make an English translation.
In the same location (/home/QtPalmtop/bin/dmblogger/gui/), open the individual widget files in an application like BBEdit.
Toward the top you'll see something like this:
@itemMenu.insertItem(tr("*&*^%^ (&N)"), self, "new()", CTRL+Key_N)
@itemMenu.insertItem(tr("*&^&*%^$£@ (&P)"), self, "post()", CTRL+Key_P)
Replace the Japanese characters and odd symbols within the parenthetical quotes with the text after "self," i.e., "post," "new." After this, on the primary GUI, you should get something like RSS ®, Configure © and Tools (T) as your main menu headings, with Update Feed (G), Update all feeds (A) and Cancel RSS update (X) under the first, and so on.
If anyone finds this too complicated, I could post the individual widget files somewhere for easy downloading.
Incidentally, changing "netfront3" to "opera" does the trick.