If theories are sets of sentences in a particular language, then stating the same theory in a different language would yield a numerically distinct theory
Field’s disquotationalism addresses some of the worries that arose for earlier versions of this variety of deflationism, due to their connections with Tarski’s method of defining truth predicates. It also explains how to apply a disquotational truth predicate to ambiguous and indexical utterances, thereby going beyond Quine’s (1970 [1986]) insistence on taking eternal sentences as the subjects of the instances of (ES-sent) (cf. Field 1994a, 278–81). So, Field’s view addresses some of the concern