The gettextization failed (once again). Don't give up, gettextizing is a subtle art, but this is only needed once to convert a project to the gorgeous luxus offered by po4a to translators. Please refer to the po4a(7) documentation, the section "HOWTO convert a pre-existing translation to po4a?" contains several hints to help you in your task
'Gettextizazioa' huts egin du (berriro). Ez ezazu utzi, 'gettextizazioaren' zeregina arte fin bat da, baina behin bakarrik egin behar da proiektu osoa po4a-k itzultzaileei eskaintzen dizkien luxuak eskuratzeko. Irakurri po4a(7) dokumentazioa, "HOWTO convert a pre-existing translation to po4a?" atalak zure zereginean lagun zaitzaketen zenbait gomendio ditu