Science writer Sam Kean, in his book The Disappearing Spoon, worked really hard on this and after much sleuthing, he landed on a word that comes not from dancing English nannies but from virus-hunting scientists. It's a protein, found in a virus, but this is a very dangerous, economically important virus, the first ever discovered...

The effects of immigration on the total output and income of the U.S. economy can be studied by comparing output per worker and employment in states that have had large immigrant inflows with data from states that have few new foreign-born workers. Statistical analysis of state-level data shows that immigrants expand the economy's productive capacity by stimulating investment and promoting specialization. This produces efficiency gains and boosts income per worker. At the same time, evidence is scant that immigrants diminish the employment opportunities of U.S.-born workers.

So when your Marathi friend emails you “You like orange pants with purple frill” – the odds are she only wants to know whether you do, and forgot to add the question mark. It’s less likely she’s accusing you of questionable taste. (Although what made her ask to begin with is something to think about.)