If you mean "childrenese" it seems to be trying to mean "the language spoken by children," but of course there is no such thing, and the word is improperly constructed to convey that meaning even if there were such a thing. Use baby-talk.
"Chidrenese" does not appear to be a recognized term. It may be a misspelling or a unique term used by one individual or group. Can you provide more context or clarification so I can better assist you?