Is there a way to get traditional chinese characters?
If you are referring to traditional Chinese characters for any of Chinese-learning course, then you can include the extension from here.
Otherwise, if you are learning other-language-for-Chinese course, then there is currently no available option from the settings since it was removed months ago.
It would really help if you specify what you are exactly looking for.
Then the extension I gave to you is exactly the one that works.
There is currently no traditional Chinese for English course, so give that a try for the Google Chrome browser!