Honduran cooks learn Mandarin. Mexican clerks learn Korean. Most often, people learn Spanish.

We have to think carefully about which languages those are. French, for example, is declining as an international language, but Spanish, Mandarin and Arabic are all languages of the future. Ethnic minority groups in the UK may well prove to be a major asset in this effort.

English is likely to remain one of the world's most important languages, but the share of the world's population that speaks English as a native language is falling. As of 1995, English was the second most-common tongue in the world, trailing only Chinese. By 2050, Chinese will continue its predominance.

Since they tend to live and work alongside other ethnic communities, they may find they have to learn other languages as well.

The hardest part is, it didn't have to be this way. If people had evacuated -- of course, where are they going to evacuate to? But other people did evacuate. Everybody that died here was needless. It's just the senselessness of it all.

It's unexpected revenue, because people are just doing what they were always doing. It's not like a whole new market opened up. There's no behavioral change. It's just more money.