Hymns are a great way to learn Tongan language. With not much resources around they are a great way to start.

Lyrics

ʻEiki te u ʻi fē, kapau ʻe ʻikai te ke kau mo au
ʻI ho haʻofinima naʻa ne pukepuke au
Ne u hē he teleʻa ʻo e mate ʻEiki ē
Ka kuo ke haʻu ʻo fakahaʻofi au

Where will I be if you are not with me, Lord
He held me so in the palm of his hands
Oh Lord! I was lost in the valley of the death
But you have come to save me!