The scientific literature on bilingual learning and living experience is abundant. Positive cognitive and social inclusion effects dominate the results. The scientific research has moved on to more tricky questions of bilingualism which shifts gear to multilingual learning. Many people and children are bilingual plus additional contacts to another or several other languages. Multilinguism has been of interest for several scientific disciplines. The effects on cognitive development have received a lot of attention. In order to achieve further progress in the study of multilingual development, it is instructive to move beyond bilingualism and the WEIRD particiants in most psychological studies (WEIRD = Western, Educated, Industrialized, Rich and Democratic). The paper by Omane, Benders & Boll-Avetisyan (DOI) takes this as a starting point and investigates the experience of infants with 2-6 languages.
They establish a protocol how to record the surrounding languages in a structured way. A major distinction into direct and indirect exposure to languages is a major finding. The example from Ghana provides a useful basis for other studies of multilingual experiences. A correct recording of different language inputs in time and of the sources is at the basis for later measurements of effects of different kinds of exposure and intensity of exposure.
(Image: Children’s room in Berlin Museum Martin Gropius Bau 2025) 
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