The article scrutinises the concepts of fertility and infertility as reflected in Nigerian English. For this, a mixed‐methods approach is suggested that uses the Corpus of Global Web‐based English as a resource to shed light on lexical frequency and collocations, as well as a newspaper corpus of online articles from The Guardian and Vanguard for an analysis of cultural conceptualisations. On the basis of the findings, a Nigerian cultural model of fertility and infertility is proposed in the form of a network of interrelated cultural conceptualisations. It is also discussed how this model is conceptually connected to neighbouring cultural models. The aim of this article is, first, to show that Nigerian English has been conceptually adapted to the local setting and is fully capable of expressing cultural conceptualisations and, second, to highlight the usefulness of analytical concepts from Cultural Linguistics to the study of world Englishes.