Hello Hansi!
The problem about most Tongan/Oceanic poetry is that it utilizes a sort of an apocryphal form called "heliaki" in which certain stanzas are written in ambiguity to keep the poet's true intentions hidden. However, my own intention is that interpretation is up to those who read my poems -- including the translations I do for them.

But to answer your question, I did translate some of the same lines freely to avoid being repetitious.

Instead of using the literal rendering of "Tapu mo e tupu'i 'Otua ko.." --> '[My] respect/acknowledgement to/for the old God [...]', I would then do away with the first half of the line and say "And to" or "And also to" instead.

If you like, I can make another translation; one that is more literal to the source.

Thank you for bringing this up, by the way. :)