1. Studies on the history and prehistory of the Basque language

• Text editions
• Historical grammar
• Synchronic and diachronic dialectology
• Reconstruction of Proto-Basque

2. Analysis of Paleohispanic languages and epigraphies

• Digital edition of inscriptions
• Linguistic analysis of the anthroponymy and theonymy
• Classification of Paleohispanic languages and dialects

3. Typology of linguistic structures and innovations

• Grammatical expression of animacy
• Evolution of morphological strategies
• Diachronic asymmetries between main and subordinate sentences
• Grammatical gender and language contact
• Processes of development of subordination mechanisms
• Transversality of grammatical categories