Simultaneous Bilingual Writing?
I have recently undertaken a personal project to translate my WIP novel into Japanese in parallel with writing it. I am managing both in LaTeX and editing them in vim, but the topic itself is too specific for either crosslisting, I feel. Is there any good software for writing translations *of works that are themselves changing* over time in parallel? (I would normally cp the file and translate paragraph-by-paragraph, but I would lose any progress I made so far of the translation, or be translating out-of-date source material due to the edits I am working on in the original). Besides that, any advice?