I'm going to occasionally say the word "mate" now
Why do you want to use the word mate?
It's a unique Australian expression. It will bring me closer to my national identity.
It's great to get back in touch with your nationality or ethnicity. It's within your right to express such words into your daily vocabulary to feel a sense of belonging. Not doing so might leave you feeling untouched with your real side.
Thanks for the input!
Being yourself no matter where you are is for the best. This way you'll always feel comfortable and worry less about how you come across in certain situations. This will help others around you be comfortable as well.