RTF (Rich Text Format) is a standardized all-text format for
designating styling and formatting information within a
document.  Because this information is saved as text within
the document, it would be disastrous to filter this information
through the dialect; no word processor would be able to
interpret the information afterwards, and the converted RTF
file would be useless.

If you choose “RTF aware” from the Options menu, ^
will leave the RTF styling and formatting information alone,
while still converting the actual text to Fudd talk.

NOTE:
You should only turn on RTF awareness if you are converting
RTF files; plain text files may not be converted properly if
“RTF aware” is turned on.