Design decisions validated at mid-fi: The language toggle in the header was confirmed as essential at this stage. Creole labels fit within the nav bar without truncation. However, first-round usability testing at this fidelity revealed that the language toggle disappeared on deeper screens and 2 of 5 participants could not find it mid-session. This led directly to the post-test design decision to move the toggle to a persistent global location in the top navigation bar · applied in the hi-fi version. The simplified body diagram schematic confirmed that a visual body-tap input method was intuitive without requiring the final illustrated version. ↑ Usability test finding. Round 1

Design decisions finalized at hi-fi: The deep forest green header creates immediate brand recognition and communicates calm authority before a word is read. The urgency result screen leads with a green checkmark icon, the color and icon together signal "safe" before any text is processed, a decision validated in post-iteration usability testing where satisfaction scores rose from 4.4 to 4.8 out of 5. ↑ Usability test Round 2 The medication instructions screen demonstrates a fourth hi-fi screen to show feature range: culturally specific food examples ("menm yon ti repas konte", even a small meal counts) replace the generic "take with food" on the original label, directly addressing Carlos's confusion identified in his journey map.