I don't think it's that much of an issue.
While Makmende has become the first Kenyan meme, compared to the entire web, it remains kind of niche.
It's more likely that we can be stuck while researching for foreign memes, either because of language barrier or because some pieces of information are missing, lost in translation.
That's why some research groups were brought up on the forum. I'm of course talking about Japanese memes, which helped writing entries for many Japanese memes, some of them already confirmed.
Inspired by it, a Brazilian work in progress version is underway.
While Watcher's idea can be quite useful, I don't think it's that necessary.
We just have to make it very clear that we don't leave non-English memes behind.
Besides, there are active non-English members that are always ready to help concerning specific languages and foreign-countries-related localized memes.
But, if something has to be done, I think that the best would be to encourage the creation of single-language-research topics like the Japanese and Brazilian ones.
Why not carry one with a Chinese one and a Russian one (2 big countries), for example, and then create one everytime we can witness an increase in memes related to a token foreign country ?
Concerning websites oustide of KYM, I don't know if we can't be of any help to make people reconsider about foreign memes, other than simply highlighting it everytime it can be necessary.
But on the other hand, Christopher is right : there ARE foreign memehubs, even if they aren't as well-known as the english ones. I'm thinking about Uncyclopedia, which seems to gather decent information concerning Spanish/Portuguese related memes, or also about the existing Russian version of LurkMore. I then suppose that we can find useful material on these two sites.
There must be more out there.