Regular Expressions cannot be negated in general.
Since you want to negate a portion of the search, this comes as close as I could get it within the RegEx boundaries that GExpers Grep Search understands:
\'.*\'.*[^n][^o][^t][^ ][^t][^r][^a][^n][^s][^l][^a][^t][^e]$
Edit: Forgot the end-of-line $ marker, as GExperts Grep Search cannot do without.
blokhead explains why you cannot negate in general.
This Visual Studio Quick Search uses the tilde for negation, but the GExperts Grep Search cannot.
The grep command-line search has the -v
(reverse) option to negate a complete search (but not a partial search).
A perfect manual negation gets complicated very rapidly.
--jeroen