Bilingual Preschooler: Language Difference, Delay, or Something Else?

The first priority is a full diagnostic audiological evaluation, not a language diagnosis. A passed newborn OAE screen is not sufficient at 4 years: it does not exclude mild, progressive, unilateral, or conductive hearing loss, and it does not assess auditory neuropathy spectrum disorder in a child with inconsistent responses to name. The evaluation should include otoscopy, tympanometry, acoustic reflexes, OAEs, and behavioural audiometry appropriate to his developmental level, with ABR if behavioural thresholds are unreliable. The reported inconsistency, limited response to name, and unclear speech could reflect hearing loss, a language disorder, autism, attention difficulties, or a combination. Ruling out hearing loss first prevents misattributing an audiological problem to bilingualism or poor behaviour. If hearing is normal, the next step is a bilingual speech-language assessment, not an English-only test. The parents should be told that bilingualism does not cause language delay and that assessment will examine both languages.

Assess both languages, using a trained interpreter or a bilingual speech-language pathologist if the clinician does not speak Punjabi fluently. Do not translate a standardized English test on the fly and report the score as valid. Collect a language sample in Punjabi during play and daily routines, and a separate English sample at preschool if possible. Obtain parent-report vocabulary and grammar inventories, teacher questionnaires, and a case history covering communication intentions, gesture, play, response to name, and social reciprocity. Use dynamic assessment to see how quickly he learns new words or grammatical patterns with support, because this distinguishes language difference from disorder better than a single English score. Include nonword repetition and narrative or play-based tasks suited to his age. Screen for autism with a validated tool such as the M-CHAT-R/F and seek developmental or paediatric input if social-communication concerns persist. Assess oral-motor structure only if there are feeding or speech-motor signs; do not substitute a oral-motor examination for language assessment.

Look for converging evidence rather than relying on one label. A bilingual language difference is likely when skills are comparable to bilingual peers after both languages are considered, and when the child's profile follows normal bilingual acquisition, including uneven exposure and code-mixing. Developmental language disorder is more likely when there are deficits in both languages, poor nonword repetition, difficulty learning new forms in dynamic assessment, and functional impairment in everyday communication, with no better explanation. Autism should be considered when social-communication difficulties are pervasive across languages and contexts, with limited joint attention, unusual response to name, and restricted or repetitive behaviours; the current report has some social concerns but insufficient information, so a diagnostic autism assessment may be needed. Hearing loss must be excluded first. His vocabulary of roughly 35 words combined and no two-word combinations is below expectations for a 4-year-old, so 'just late talking' is not an adequate explanation. The conclusion should be provisional where needed, with a plan for bilingual intervention, parent coaching, preschool support, and review.