Replace a single word but not when it's a part of a sentence
I'm translating a bunch of text and I have a handful of places saying "Yes" and "No". I want to replace all instances where it _only_ says "No", but avoid replacing "No"'s from other instances where it is a part of a longer sentence.

E.g:
Want to translate: No -> Nei
Want to avoid: This is no longer available -> This is nei longer available

Is this possible?
I tried the "Whole word" option but I might be misunderstanding what that option does.