When you upload a new manuscript for the edition a translation was made from, its Translation tab says so. Bring the changes in, and the translation lines up with your new text:
- lines you didn't change keep their translation, even if they moved;
- changed lines keep their old translation as a starting point and wait to be translated again;
- new lines wait to be translated; lines you removed go from the translation too;
- a line that's back as it was before, because you brought back an earlier manuscript or undid a change, gets the translation it had then, as you left it, and isn't paid for again.
Then translate the waiting lines, priced by their words, and make the manuscript again to rebuild every file.