Translating the phrase "I can't confirm nor deny etc."
Assuming you're not going for a word-for-word, literal translation I would suggest:
无可奉告
MDBG

(idiom) &quot;no comment&quot;

Wiktionary

to have nothing to say (in a diplomatic context); no comment

The superiority of a semantic translation over a 1:1 translation is the fact that you can get straight to the heart of the matter without confusing your audience with turns of phrases and terms that they may have never encountered before.

Of course, if you do need a literal translation:

我们既不能确认也不能否认, (2)

does work.
HKU Public Opinion gives an alternative translation:

無意肯定或否定

The UN, here, opts for:

不能肯定、也不能否定

but in the same document also translates it as:

既不证实也不否认