This work has a uniquely cognitive-functional perspective on bi-lingualism. This means that it makes a clear distinction between real world and projected world. Information conveyed by language must be about the projected world. Both the experimental results and the systematic claims in this volume call for a weak form of whorfianism. The authors examine too some relatively unexplored issues of bilingualism, such as, among others, gender systems in the bilingual mind, synergic concepts, and ontological categorization.