The main goals of this paper are to highlight the new philosophical aspects emerging from Wittgenstein’s Nachlass and to analyze some of the philological questions that should be considered by editors and translators of Wittgenstein’s writings and by scholars of Wittgenstein’s philosophy. There are undoubtedly advantages to be had from exploring Wittgenstein’s Nachlass and this contribution will be focused on them. However, there are also some critical issues to be taken into account. They concern Wittgenstein’s way of writing and doing (...) philosophy as well as the status of Wittgenstein’s manuscripts and the history of their publication. The advantages of investigating Wittgenstein’s movements of thought through and across the Nachlass and the resulting critical issues will be argued from the perspective of direct work editing Wittgenstein (e. g., the edition of two discovered letters of 1934 from Wittgenstein to Sraffa) and through the semantic reconstruction of crucial concepts from Wittgenstein’s philosophy. This reconstruction has been realized by the searching of Wittgenstein’s concepts occurrences and the recording and exploration of the nuances of meaning represented by each occurrence within the project to compose a Wittgenstein dictionary from the Nachlass. (shrink)