This volume brings together the contributions of the participants in the research project 'Immigration, personal freedom and fundamental rights', sponsored by the Faculty of Law of the University of Urbino 'Carlo Bo'. The discipline of fundamental rights for immigrants, which is extremely broad and fragmented, is the subject of reflection from different perspectives. Firstly, the research focuses on European legislation, in particular the European Convention on Human Rights (as interpreted by the European Court of Human Rights), the EU Charter of Fundamental Rights (as interpreted by the Court of Justice of the European Union) and the relevant EU directives. From the European legal framework, the study moves to the Italian legal system, starting with an analysis of the Italian Constitution. The Constitution guarantees non-citizens rights similar to those of citizens in criminal and judicial matters, particularly in terms of individual liberty, access to justice and legal representation, including the right to language assistance, which is the focus of this research.