It is not exclusively the language of Deaf people; many relatives of Deaf people and others can communicate in it fluently.
When the child is communicating fluently and clearly, the most appropriate adult response may be to listen and encourage.
Though of apparent Korean descent, his actual origins are unknown and he communicates fluently in both English and Korean.
Digital Natives can communicate fluently with digital devices and convey information in a way that was impossible without digital devices.
They communicate fluently in human language (although only telepathically), and have personalities and opinions distinct from those of their riders.
Many of the Chitty are unable to communicate in Tamil fluently.
For example, she was able to fluently communicate with Lockheed in his native tongue, a fact that clearly surprised her crew.
For that reason Croats, Serbs, Bosniaks and Montenegrins communicate fluently with each other in their own standard language.
Pogrebinsky began studying French in 1958, and by the 1970s was fluently communicating with artists in Western Europe.
Narmada was able to fluently communicate in seven languages, including English.