Hi, and thank you for your interest!
libgettextdemo is being translated using Weblate, a web tool designed to ease translating for both developers and translators.
Translation project for libgettextdemo into Chinese (Taiwan) currently contains 7 strings for translation and is 100.0% complete.
If you would like to contribute to translation of libgettextdemo, you need to register on this server.
Once you have activated your account just proceed to the translation section.