This article is from the ZTerm FAQ, by Les Jones firstname.lastname@example.org with numerous contributions by others.
I used to say it couldn't be done, but I found a way.
ZTerm recognizes four varieties of quotation marks: single quote,
double quote, smart single quote, and smart double quote. If you
begin a send statement with one type, ZTerm won't stop sending
until it reaches another quote of the same type. (It doesn't,
however, care which way the smart quotes face.) For instance, if
the send line looks like this:
send ' "It is not I who am crazy ... It is I who am MAD!!!" ^M'
ZTerm will send everything within the single quote marks
If your send string contains double and single quotes, enclose the
string within smart quotes. KeyCaps DA will show you the correct
keys for producing smart quotes in your word processor or text
editor. As a rule of thumb, don't enclose smart quotes within the
send string, because smart quotes use the eighth bit.