I think one of the reason is most of these company in US despite their origin don't think Internationaly. They only think nationaly, and locally. When they start making the softwares, they only think English, and because of New England area, French, and because we are next to Mexico, they think of Spanish, but they don't think beyond that.
The company later on that does implement International language, will probably be the one that see a jump in their sales. The International people might not make up a lot of percentage for the market here, but lets say we make up of 5% who knows both Eng