Merged PR 2449: language helper

Related work items: #23754

context/architecture.md

@@ -51,6 +51,55 @@ Business responsibility clarification:
 
 This architectural reference builds on those business concepts but does not replace the more detailed terminology guide in `context/business-domain-overview.md`.
 
+## CRM Display Infrastructure Status (2026-07-01)
+
+### Stream status
+
+**CRM Display Infrastructure: COMPLETE**
+
+### Shared helper introduced
+
+- `lib/i18n/crmDisplay/resolveCrmDisplayValue.js`
+
+### Helper contract
+
+The shared CRM display resolver should be understood as handling the standard CRM formatted/display-value translation concern only.
+
+Current contract:
+
+- missing CRM display value -> return `fallbackValue`
+- English -> return CRM display value
+- Welsh -> return translated value when available
+- Welsh without translation -> return CRM display value
+
+### Architectural responsibility
+
+This helper centralises the standard CRM formatted/display-value translation pattern used across portal presentation surfaces.
+
+It should be treated as the shared compatibility seam for:
+
+- CRM formatted values
+- CRM display values
+- standard EN/CY display translation lookup
+- existing consumer-specific absent-value fallback handling
+
+### Boundary exclusions
+
+The helper boundary intentionally excludes the following concerns:
+
+- keyed lookup translation
+- project-type list translation
+- hyperlink / website rendering
+- mixed presentation rows
+- lifecycle interpretation
+- status interpretation
+- post-decision interpretation
+- other presentation-specific derived values
+
+These are separate architectural concerns and should not be folded into `resolveCrmDisplayValue(...)`.
+
+If future work is needed in those areas, it should introduce a separate abstraction rather than broadening the helper.
+
 ## Portal API Platform Assessment Status (2026-06-20)
 
 ### Stream status