Any language that pretends to communicate but actually does not

• Evasive language
• Equivocal language - dupes a bloke
• Equivocal language — dupes a bloke (anag)

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Appeasement caused by blindness was followed by delaying tactics and doublespeak intended to buy time. ▪ The same description might be used to indicate the power of political doublespeak .

WordNet Word definitions in WordNet
n. any language that pretends to communicate but actually does not

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1957, from double (adj.) + speak , coined on model of doublethink in Orwell's "Nineteen Eighty-Four" (the language in that book was Newspeak ).

Wiktionary Word definitions in Wiktionary
n. Any language deliberately constructed to disguise or distort its actual meaning, often by employing euphemism or ambiguity. Typically used by governments or large institutions.

Wikipedia Word definitions in Wikipedia
Doublespeak is language that deliberately obscures, disguises, distorts, or reverses the meaning of words. Doublespeak may take the form of euphemisms (e.g., " downsizing " for layoffs , "servicing the target" for bombing ), in which case it is primarily ...