The theme of the conference comprises three key elements important in speech research today: language diversity, diversity of applications, and diversity of representation. Graz lies at the unique crossroads in the heart of Europe where the large Romance, Slavonic, and Germanic language families meet. In a globalized world, the regional varieties of pluricentric languages are becoming ever more important to shape our linguistic identities. Speech and Language are active research topics of all four universities in Graz. Through special sessions, we will explore crossroads of Speech and Language with science and technology, with the humanities and language teaching, with medical diagnosis and therapy, and with singing and artistic performance. Speech and Language by themselves span a wide range of representation layers in the 'stacks' of human-human, or human-machine communication, extending from the bits of the acoustic waveform to pragmatics at discourse level. We will put special emphasis on the deep interaction among and across these representation layers by soliciting invited talks around these issues.