This little Python script can create a fortune(6) file with quotes from a Wikiquote page; I've only tested it on a few TV Show pages and the parser is not very robust.
You can install it from source like every other Python package, running a command like:
$ python3 -m venv ./venv
$ . ./venv/bin/activate
$ python3 setup.py install
To fetch and create a fortune file for Star Trek TNG:
$ wikiquote2fortune -o star_trek_TNG Star_Trek:_The_Next_Generation
$ strfile star_trek_TNG
NOTE: the command strfile is part of the fortune package.