How to convert boolean to localized string

There is any way to convert a boolean value to a localized string. I have tried:

var x = true;

var culture = new CultureInfo("en-US")
x.ToString(culture) // returns True

culture = new CultureInfo("pt-BR")
x.ToString(culture) // returns True, expected Verdadeiro

Or should I start typing the switch now to end before 2020?