This mixed-access deposit supports the research article “Within-Speaker Cross-Lingual Stability and Independent Native-English Replication of Acoustic Associations With Depressive Symptom Severity.” It contains open analysis and feature-extraction code, documentation, a data dictionary and non-disclosive aggregate outputs, plus controlled-access participant-level acoustic-feature datasets for 103 Syrian and 30 British participants. The controlled files contain pseudonymous IDs, PHQ-9 scores, age, participant-reported sex/gender, stimulus condition, language and eight derived acoustic features. Raw audio and direct-identifying metadata are excluded because the applicable consent and ethics conditions do not permit sharing or reuse.