en_tn_lite_do_not_use/jhn/18/37.md

Are you a king then?

“So, you are a king.”

testify to the truth

"tell people the truth about God"

who belongs to the truth

This is an idiom that refers to anyone who loves the truth about God. (See: rc://en/ta/man/jit/figs-idiom)

my voice

Here "voice" is a synecdoche that refers to words Jesus says. Alternate translation: "the things I say" or "me" (See: rc://en/ta/man/jit/figs-synecdoche)