I think that to translate and understand the meaning, its good to check LINGUEE or WORDREFERENCE. They have so many languages and also they have some expressions in your language or in english to make it easier to understand the concept.
Here I put one that made me easier understand the concept and apply to choose what to eat, and to take that decision by my own, by myself.
own choice (decision made freely)
own choice (individual free will)
My parents wanted me to go to law school, but I made my own choice and attended art school instead.