Eh. Actually the true advantage is that I can see more easily - or at least it's more natural to see - also the perspective of non-native English speakers that will make use of the service, so that I can optimize it for a greater world population; at least avoiding common mistakes that keep occurring in services that I use/try, but also taking that into great account while designing the whole thing.
Nice read on the topic: http://online.wsj.com/article/SB122178211966454607.html