I hope that in ten years time the computers do understand English AND OTHER LANGUAGES AS WELL (sorry for shouting), but I have to make the point that there are a few countries where English is not the spoken language!
They might even hold the majority of earth population:
China: ~1 billion of ~5 billion earth population, India another ~1 billion, the rest of Asia, all of South America, all Europe except UK and Ireland, biggest part of Africa

Andreas, defender of the non-english-speaking nations