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Aphasia is a language disorder secondary to acquired brain injury, one of the main symptoms of which is anomia, a difficulty in accessing words. Based on the observation that some patients with anomia can covertly generate the phonological form of the target word without being able to produce it overtly, this preliminary study aimed to develop a training protocol based on the covert production of words in order to study its effectiveness with this population. Two patients with anomia received two sessions a week for four weeks of an innovative inner speech training and two sessions of a semantic therapy. A control patient received two sessions of phonological therapy and two sessions of semantic therapy for the same duration. Changes in pre- and post-training scores on a number of linguistic, cognitive, and metacognitive tests were studied for individuals and for groups. The participants in the experimental group improved their performance more than the control patient, both in naming and in semi-induced language production. Their metacognitive ability concerning their subjective experience of inner speech also appeared to be enhanced. However, their performance in verbal working memory remained stable. These encouraging results call for larger-scale studies to confirm the value of this approach.