It was a link to an article by an s/lt working with bilingual kids.
I normally go the ABA route first and foremost, rather than the s/lt one (I'm a BCBA and an s/lt) but in the case of bilingual issues, a specialist s/lt will know more than a BCBA.
Here's what I managed to cut and paste-reference at bottom.
In the article, Issues in Bilingualism and Heritage Language Maintenance: Perspectives of Minority-Language Mothers of Children With Autism Spectrum Disorders, Betty Yu discusses bilingualism in children with autism. She indicates that families of children with ASD are often reluctant to speak to their children in their native language for fear of confusing the child or "exacerbating" the impairment. As SLPs in a culturally and linguistically diverse country, we are key to helping families understand the role of their native language in the child's impaired language development. Yu emphasizes the message often given to families by professionals in the field that they should speak English only.
Yu states that encouraging parents to speak English only contradicts ASHA's position statement (2004, 2005, 2011), which urges practitioners to regard the families' cultural and linguistic preferences. Yu indicates that native languages are key to the following:
facilitation of cultural identification
transmitting family values
fostering intimacy
promoting attachment
She moves on to say that asking parents to speak English only is unsupported by research. Yu cites Genesee, Paradis, and Crago (2004), who argue the inappropriateness of advising that children with language impairment should learn only one language. She continues to cite Paradis and Crago, indicating that the circumstances of each child should be individually assessed to determine whether dual language use is suitable.
Yu indicates that only a few studies to date have been conducted with children that have autism as far as bilingualism is concerned. One study Yu cites was conducted by Hambly and Fombone (2012) which compared three groups of children. One was a monolingual group, the next was bilingually exposed for 12 months prior to the study, and the last was bilingually exposed 12 months after the study. Hambly and Fombone assessed the following: social responsiveness, initiating of pointing, response to pointing, attention to voice, total conceptual vocabulary, words in dominant and second languages, age of first words, and age of first phrases. Their study concluded that children with ASD that were bilingually exposed did not demonstrate additional delays compared to their monolingual counterparts. No significant difference was found in those particular skills between bilingual children that were raised bilingually vs. sequential bilingual environments. Hambly and Fombone (2002) reported that 60% of the bilingually exposed children were observed to be acquiring vocabulary in two languages. Yu cites other studies as well in this article.
As Paradis and Crago stated, the circumstances for each individual child should be assessed. Some questions or factors to consider might be the following:
Are the parents fluent English speakers, bilingual as well? - If the parents are fluent in English they may choose this language over the native one until the child demonstrates the ability to communicate proficiently in English.
Is English language proficiency limited? - If English proficiency is limited in the family then this may limit language rich vocabulary.
Is the family more "Americanized" or acculturated? If so, to what extent? - Some families might highly value American culture and want their child to speak English first.
Does the child attend preschool? - Some parents might fear that if they speak their native language their child might have a hard time communicating in English with other children in the community or a school setting.
I would never ask a family to speak English only if their English language proficiency was very poor because this compromises their ability to give their child a rich vocabulary. I always advise parents to speak to their children in their language rich vocabulary and I explain why, whether they have ASD or not. Often, parents of bilingual children fear that two languages might confuse their child or worsen the delay. However, this is not the case. Although, if you are working with a bilingual family that is also English proficient, you can explain the benefits of bilingualism but they ultimately decide which language they feel is best for their child. It is important to explain the benefits of bilingualism and be able to answer or clear up any doubt the family might have to help them make an informed decision regarding language use.
Reference:
Yu B. "Issues in bilingualism and heritage language maintenance: perspectives of minority-language mothers of children with autism spectrum disorders." American Journal of Speech Language Pathology. 22.10-24(2013). ajslp.pubs.asha.org.