Criteria for All Treatment Cycles:  Inclusion Criteria:  Clinical diagnosis of aphasia At least 6 months post-onset of stroke in the language-dominant hemisphere. Native English speakers Demonstrate sufficient auditory comprehension skills to participate in a supported conversation, based on results of standardized aphasia tests  Exclusion  No history of neurological disease (other than stroke) No history of developmental speech, language, or learning disabilities No current serious medical illness (e.g., cancer) Participants will be asked to abstain from concurrent speech language treatment.  Separate criteria for Treatment Cycles 1, 2, and 3 based on aphasia severity:  Cycle 1 Severity-based Inclusion Criteria (Planned 2022):  -- All aphasia profiles and severity levels.  Cycle 2 Severity-based Inclusion Criteria (Planned 2023):  -- Participants with severe aphasia  Cycle 3 Severity-based Inclusion Criteria (Planned 2024):  -- Participants with mild-moderate aphasia.