This volume brings together cutting-edge research on the dynamic processes that shape languages over time, focusing on grammaticalization, lexicalization, and constructionalization. Featuring studies from a diverse range of languages-including Spanish, Italian, and German Sign Language-this speical issue highlights the intricate ways in which grammar evolves, influenced by usage patterns, social factors, and cognitive frameworks. Whether you are a linguist or simply curious about how languages change, this speical issue offers a comprehensive yet accessible analysis of the mechanisms behind language development. Discover new insights into how everyday language structures transform into complex grammatical systems, revealing the interconnectedness of form, meaning, and contextualization.