[toast0]

I think you could do a bare minimum and be ready to do more work to finalize it later if there's demand. If you think there's a good chance there won't ever be demand, then maybe it's not even worth this.

I think the bare minimum would be gettext style string marking, which is generally gettext("english string") in the source; other string marking techniques may provide a better localization, but this one is easier. Also, try to follow general guidelines for creating strings so they're likely to be localizable. Gettext's guidelines[1] are decent. You don't actually need to use gettext -- you can make a 1 line function or macro that just passes through the english text as is for now. Even if you don't mark strings, at least thinking about string guidelines will help for the future.

If you ever decide to come localize in the future, at least you won't have to markup all the strings, and hopefully you won't have done a lot of "string math" which is painful to unwind. You'll still have a big amount of work to test and fix any strings that were missed, but you'll be a lot farther ahead.

[1] https://www.gnu.org/software/gettext/manual/html_node/Prepar...