For many years, Nintendo has never provided an official translation for Animal Crossing in Traditional Chinese.
However things have changed after the release of Animal Crossing: Pocket Camp. The Animal Crossing series is now called 動物之森 in Traditional Chinese, which literally means Animal Forest in English. In fact, どうぶつの森 also stands for Animal Forest when translated from Japanese into English.
This information comes from the latest Super Mario Run X Animal Crossing: Pocket Camp launch campaign that is currently going on right now.
The Animal Crossing series now has an official Chinese Traditional translation: 動物之森 pic.twitter.com/jorsnXy471
— Chinese Nintendo (@chinesenintendo) November 23, 2017