LANGUAGE BARRIER Some bosses don't want to hear Spanish Lawsuits fuel debate over English-only rules at work WHEN the captain heard three crew members on his container ship chatting in Spanish during breaks, he became enraged. He then brandished a knife to enforce his standing orders: Speak only English on board. The incident, settled for $31,000 after a discrimination suit was filed in a Houston federal court, is an extreme example of cases fueling a growing debate over English-only policies in the workplace, experts say. ''It's a lightning-rod issue, a lot of people get upset," said Rudy Sustaita, a veteran...