Full Idea
Quine takes to the principle of charity to apply only to the translation of the logical constants.
Gist of Idea
The principle of charity only applies to the logical constants
Source
report of Willard Quine (works [1961]) by Alexander Miller - Philosophy of Language 8.7
Book Reference
Miller,Alexander: 'Philosophy of Language' [UCL Press 1998], p.272
A Reaction
Given how weird some people's view of the world seems to be, this very cautious approach has an interesting rival appeal to Davidson't much more charitable view, that people mostly speak truth. It depends whether you are discussing lunch or the gods.