When Latin American audiences tune in to the new season of The Simpsons in July, they might notice something oddly different about the voices of Homero or Senor Burns. That’s because a labor dispute has prompted a dubbing studio to replace the program’s famed Spanish-language cast members as it heads into its 16th season. “Los Simpson” has been a huge success throughout Latin America. The big question now is how viewers will react to an entirely new cast of voice actors. “I’m deeply disappointed because we did such quality work and now they’re using other people,” said Humberto Velez, who had been doing the voice of Homero Simpson for 15 years. “Every one of us has given personality to the characters and that’s because we loved what we were doing.”