While citizen science is gaining a foothold in more and more disciplines, the exchange of data between citizen science projects is rather low. Citizen science boasts of its societal relevance, but projects are often only disciplinary. Many natural science citizen science projects address biodiversity loss. However, diversity loss is not limited to biodiversity, but also affects the diversity of human cultures and languages. Diversity in all these areas plays a major role in the resilience of systems, whether biological or social. However, the complex interrelationships between biological and cultural diversity can only be studied by involving society in academic projects and by exchange across projects. This contribution therefore presents a concept for citizen science practitioners on how citizen science projects from the natural sciences, social sciences and humanities can contribute to the analysis and appreciation of biocultural diversity.