don't mix it the input type strings with the translations...
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Those strings, that you talk about, can be set in the ubercart settings pages, as input types. It tricked me too at first, but after a fast sql search in all tables I figured that those are values from forms, you will have to set those manually.
600 translations is nice work, if you find other people interested into helping, tell them to subscribe to the pt-pt group, for no it's only you and Leo.
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RAk