The papers comprising this volume focus on a broad range of acquisition phenomena (subject dislocation, structural case, word order, determiners, pronouns, quantifiers and logical words) from different languages and language combinations. These include languages with large numbers of speakers (French, German, Spanish) and less frequently spoken ones (Norwegian, Russian, Swiss-German, Hebrew, Basque and Serbo-Croatian) within different language acquisition scenarios and a wide range of populations. Most contributions adopt a common theoretical background within the generative approach with the aim to advance, discuss and critically analyse other research on first, bilingual and language impaired acquisition. The various sections of this stimulating volume reflect different theoretical and methodological perspectives of current research investigating morphology and syntax and offer diverging interpretations.