The best replacement for language delay is language disorder.

The best alternatives to language delay are rated as following:
★★★★★  language disorder
★★★★  autism
★  late talker
★  language impairment
  disorders
  language difference
  speech delay

Your alternative for language delay is not listed? Suggest!
Speaking about language delay, one probably shouldn't forget about autism.

Other search terms related to language delay and their ratings are:
★★★★★ autism
You have in mind a companion for language delay and it is not yet here? Propose!



Google Trends

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language delay
language disorder
autism