This article documents an empirical research carried out in 2004 in Aileu, more specifically in the Quinta Portugal project of the Portuguese Cooperation. It was an oral Portuguese language course for illiterate rural workers. The course had the instrumental objective of communication between Portuguese co-operators and Timorese employees and trainees during the cultivation work time on the Quinta. Choosing the useful content for such communication, defining the methodological approach and its application was an important experience in testing theories of reference theorists such as Freire (2011) and Kraschen (1981, 1985) about L2 learning and acquisition and teaching non-schooled adults. We concluded that the Quinta's informal environment, Kraschen's natural approach and Freire's definition of generative words contributed significantly for students to overcome psychological barriers in relation to learning and in relation to the Portuguese language and this improved communication in the project.