If there is no discussion, or just the same 2-3 people talking, then it does not make sense to continue.

The new readers attracted by the translated texts should have some time to find the site; if you translate one article on LW into Swahili, there will almost surely no discussion, even if there was a big number of potential Swahili speaking LWers: those who already read the English version have probably commented on the original article and have no reason to comment on the translation; for those who would become regular users of the Swahili version a single translated article isn't enough.