Gibberish is a language game that is played in the United States and Canada by adding "idig" to the beginning of each syllable of spoken words. Wikipedia

A language game Wikipedia Disambiguation

A language that is not understood, possibly not intelligeable or comprehensible at all, possibly a mixture of many languages, possibly a made up or play language, possibly a real language mispronounced to the extreme, possibly speaking attempts of a severely impaired or injured person, etc. OmegaWiki