Papers gathered in the two volumes investigate the complex relations between philosophy of language and linguistics, viewed as independent, but mutually influencing one another, disciplines. They concentrate on the 'formal' and 'philosophical' turns in the philosophy of language, initiated by Gottlob Frege, with further developments associated with the work of Bertrand Russell, Ludwig Wittgenstein, Kazimierz Ajdukiewicz, W.O.V. Quine, Richard Montague, Pavel Tichy, Richard Rorty. The volumes bring together contributions by philosophers, logicians and linguists, representing different theoretical orientations but united in outlining the common ground, necessary for further research in philosophy of language and linguistics. The papers were submitted and, in most cases, presented at the first International Conference on Philosophy of Language and Linguistics, PhiLang2009, organized by the Chair of English and General Linguistics at the University of Lodz.