It's a common problem. You book a trip, fail to pick up a phrase book and before you know it you're shaking hands, toasting or wildly gesticulating in your destination, wishing you had mastered just a couple of phrases of the local language. Since 2005, travelers on selected flights of Singapore Airlines, Lufthansa and half a dozen other carriers have been avoiding this problem with Berlitz World Traveler courses, available on personal video screens. Now other airlines are following suit this year, Continental, KLM and Air France began offering the onboard language-tuition program, which teaches the basics of...
