Some Chicago businesses post "Se Habla Espanol" signs to boast about their Spanish-speaking employees. But two hair stylists said in a federal lawsuit Thursday that their former bosses at Supercuts posted a different sign: "Speaking a language other than English is not only disrespectful, it's also prohibited." Stylists say the notice was put up in 2003, directed at employees as Supercuts managers allegedly barred them from speaking Spanish anywhere at work -- including in the break room or other places outside the earshot of customers. Supercuts says there is no such ban. "We absolutely, vehemently deny the allegations and believe...