Neologisms and idiosyncratic language in autistic speakers.

The team listened to speech samples from autistic children, kids with intellectual disability, and neurotypical peers.

They counted made-up words and odd phrases that only the speaker seemed to understand.

No one tried to teach or fix anything; they just recorded what each child said.

Autistic children used more made-up words and odd phrases than the other two groups.

These quirky words did not link to one single cause like low IQ or poor social skill.

The stranger words often popped up when the child tried to talk about harder ideas.

Tsao et al. (2003) saw a similar pattern: autistic kids skip typical word errors like under-extension and lean on object parts to name things.

Geelhand et al. (2025) later showed the odd style lasts into adulthood; autistic adults talk more only when paired with non-autistic partners.

Sutherland et al. (2017) seems to clash at first: they proved autistic kids can learn new words. The key difference is J et al. watched free speech while Rebecca et al. taught words on purpose.

Expect novel words during play or conversation, especially when the topic gets tricky. Do not mark every odd word as wrong; instead note the context and gently offer a clear label. If you need to teach new vocabulary, use both rich context and direct definitions, because the 2017 study shows both help. Finally, watch partner mix: mixed-neurotype pairs may need extra time for shared meaning.