The default settings are the best.
forms are obtacles to getting all the text.
You cannot rely on HTTrack for a few javascript sites.
You cannot rely on HTTrack for complex Flash sites (will you modify the swf or
the fla ?).
Very few php, jsp and other dynamic sites will cause problems.

Anyway if the content is dynamic, how can you translate without the source
text and data?If a site uses a MySQL table, who will translate the fields?