When an idea is raised (usually in Site Feedback), if a moderator is sufficiently interested in it, a staff thread will be created and we'll likely reach some conclusion. If there's no sufficient interest from any moderator, then a staff thread probably won't be created, and so no conclusion will be reached (and if there's no sufficient interest, it's unlikely the idea would go ahead in any case, so the lack of a staff thread is no great loss). That was the case for this idea nine months ago, but now that the idea has come up again, there has been sufficient interest to kickstart a staff discussion. So yes, if we haven't come to a conclusion on an idea, it can help to remind us of the idea or argue for it again. It's not like we've been consciously deciding to ignore this idea for the last nine months; it just hasn't been something we've thought about beyond no-one being sufficiently interested in the initial proposal to start a staff discussion. And certainly, if no-one ever mentioned it again, it likely wouldn't have come up for consideration or magically popped into our heads.
It wouldn't make much sense to assume the same is the case for the emailing problem, because it's an issue which obviously the admins have expressed sufficient interest in, and have said is being worked on. Though I suppose theoretically speaking, if it were an issue no-one on staff sufficiently cared about, and no-one had mentioned it in the last nine months, it probably wouldn't be as high on the admin priority list as it is.
It's extremely unlikely that individuals would be recruited solely for the purposes of any limited number of non-English threads which we were to allow. The moderation team doesn't work in that sort of fragmented manner.