Recent years have seen an increase in forced migration from the Global South, e.g., Congolese refugees with long transits in Uganda, to countries in the Global North, like Norway. Many of these newly-arrived Congolese refugees in Norway have English in their linguistic repertoires after decades-long transits in Uganda. English can thus be used as a lingua franca in Norway while they are learning Norwegian, as many Norwegians also have English in their repertoires. However, the ways these refugees have learnt English differ starkly from the ways most Norwegians have learnt English. While most Norwegians have mainly learnt English formally, i.e. in school, these Congolese refugees have mainly learnt English informally, i.e. outside language classrooms. The present article explores specific examples of how these refugees have learnt English. Some have, for example, learnt English through lingua franca interaction with other refugees with whom they do not share any other languages than English; others have initiated English language awareness in the wild themselves through, for example, talking explicitly about the English language with motorcycle riders in Uganda; and others have listened to English-speaking radio programmes in order to learn English faster. I argue that many of these ways of learning English informally can be referred to as “grassroots learning” of English, since English learning is initiated by the refugees themselves. These findings from empirical research among newly-arrived Congolese refugees in Norway may contribute to developing our understandings of informal English language learning, as well as making sure forced migrants’ voices are heard.