Key facts

programming language designed from scratch with the needs of high-integrity / safety-critical software systems in mind
intentionally and intrinsically based on the Orwellian concept of eliminating “Thoughtcrimes” through Newspeak
designed in 1984 by Ian Currie^[specify]; who else?

References

(any others?):

NewSpeak: …^[specify]. I. F. Currie. RSRE Memorandum^[specify] (1984)
journal article Currie I.F. NewSpeak: an unexceptional language Software Engineering Journal July 1986 pp 170-176
chapter 6: NewSpeak: a reliable programming language. I. F. Currie. pp. 122–158 in High-integrity Software. C. T. Sennett (editor). Pitman [Computer Systems series]. 1989. ISBN 0-273-03158-9 (cased) / ISBN 0-273-03000-0 (paperback).

the much more recent (2006) Newspeak (programming language) (the latter's motivation being that its namesake was “the only language in the world whose vocabulary gets smaller every year” — not to mention a cutsey allusion w.r.t. “doubleplusgood” :-().
Newsqueak

should probably consider some kind of Wikipedia:Hatnote and/or disambiguation page
George Orwell's Newspeak is undoubtedly the primary topic here.

on the other hand, neither of the programming languages seems primary in that sense:
it's surely just asking for trouble to disambiguate solely on capitalization — NewSpeak (programming language) vs Newspeak (programming language)

all this suggests renaming the existing Newspeak (programming language) to (say) Newspeak (object-oriented programming language) {don't forget to refactor using [[Special::WhatLinksHere]]}, adding Newspeak (safety-critical programming language), and possibly adding a new Newspeak (programming language) as a disambiguation page

using Wikipedia:Hatnotes:
in Newspeak:

in NewSpeak (safety-critical programming language):

in Newspeak (object-oriented programming language):
Finally, Wikipedia:Redirect NewSpeak to NewSpeak (safety-critical programming language)