  This volume contains a selection of the papers presented at the XV Jornadas
sobre Programaci\'on y Lenguajes (PROLE 2015), held at Santander, Spain, during
September 15th-17th, 2015. Previous editions of the workshop were held in
C\'adiz (2014), Madrid (2013), Almer\'ia (2012), A Coru\~na (2011), Val\`encia
(2010), San Sebasti\'an (2009), Gij\'on (2008), Zaragoza (2007), Sitges (2006),
Granada (2005), M\'alaga (2004), Alicante (2003), El Escorial (2002), and
Almagro (2001). Programming languages provide a conceptual framework which is
necessary for the development, analysis, optimization and understanding of
programs and programming tasks. The aim of the PROLE series of conferences
(PROLE stems from PROgramaci\'on y LEnguajes) is to serve as a meeting point
for Spanish research groups which develop their work in the area of programming
and programming languages. The organization of this series of events aims at
fostering the exchange of ideas, experiences and results among these groups.
Promoting further collaboration is also one of its main goals.
