Trado
True love never dies
The Latin word for now is nunc
Never leave a battle, Never abandon the fight etc. Proelia can be battle, fight, war and so on; derelinquam means to leave, abandon, desert, you get the idea.
I love
The quote "nunc at numquam?", which means "now or never" in English, does not have a known author. It is a common Latin proverb.
Never is "numquam".
Personally, I am not familiar with the phrase "Trado-Modern" and could find only one reference to its use in reference to communications. See below link for further information.
Numquam cesseris
Numquam oblitus.
numquam sine
It is never too late to become the kind of person you could be.