I am asking a question for several people from different disciplines (i.e.,teachers, ABA, SLPs, etc.)as well as for parents pertaining to young ELLs who have been diagnosed with moderate to severe autism. Parents often ask what language they should speak at home. Please keep in mind these particular students have issues that other children with other disabilities do not. Is there any evidence-based information regarding this particular group (the more involved child with autism) and bilingualism? Do you have any specific suggestions for families? NOTE: I asked an expert in autism at the university level last year about this. He gave his opinion and acknowledged he had nothing to support it, but supposed only one language should be used due to generalization difficulties, cognitive flexibility issues, level of social-environmental awareness, variable verbal language, etc. I have met other SLPs who have encountered this same experience and have the same question. Also, ABA therapists reportedly tend to tell parents the same thing the university professor said. Any assistance would greatly be appreciated. I certainly understand the logic and concern people have expressed.