Full Idea
The definition of truth will have to be, Tarski argues, relative to a language, for one and the same sentence may be true in one language, and false or meaningless in another.
Clarification
Tarski was a famous Polish logician (fl. c. 1944)
Gist of Idea
The same sentence could be true in one language and meaningless in another, so truth is language-relative
Source
Susan Haack (Philosophy of Logics [1978], 7.5)
Book Reference
Haack,Susan: 'Philosophy of Logics' [CUP 1980], p.103