diff --git a/library/components/dashboards/DashboardFilterChips.vue b/library/components/dashboards/DashboardFilterChips.vue
index c44e98caf..4311a53cf 100644
--- a/library/components/dashboards/DashboardFilterChips.vue
+++ b/library/components/dashboards/DashboardFilterChips.vue
@@ -23,7 +23,7 @@
  * already showing chips — two chip rows over one filterSet is the bug the dedup removed.
  */
 import { inject, computed } from 'vue'
-import { tStatic } from '@map/i18n/index.js'
+import { tStatic, formatList } from '@map/i18n/index.js'
 
 // This component's chrome, read out of the catalogue. tStatic and not useI18n: these mount inside
 // custom elements that install no i18n plugin, and an unguarded useI18n() throws on the way in and
@@ -54,7 +54,9 @@ const filterSet = bus?.filterSet || {}
 // punctuation: the second difference reads as a rendering bug rather than as missing configuration.
 // Kept as one liftable expression on purpose — check:legend-mirrors pulls it out of this source and
 // drives it, so "no resolver yields the raw value" is measured instead of asserted.
-const labelFor = (facet, value) => (cfg?.legend?.labelFor ? cfg.legend.labelFor(facet, value) : (Array.isArray(value) ? value.join(', ') : value))
+// Several values on ONE facet are ALTERNATIVES: the selection bus matches with includes(), so adding a value
+// widens the result. 'or' in the reader's language says that; a bare comma read as ALL to most people.
+const labelFor = (facet, value) => (cfg?.legend?.labelFor ? cfg.legend.labelFor(facet, value) : (Array.isArray(value) ? formatList(value, { type: 'disjunction' }) : value))
 const chips = computed(() => Object.entries(filterSet).map(([k, v]) => ({
   k,
   text: String(labelFor(k, v)),
diff --git a/library/i18n/index.js b/library/i18n/index.js
index c4f1f888a..2b4466abd 100644
--- a/library/i18n/index.js
+++ b/library/i18n/index.js
@@ -464,6 +464,10 @@ export function tStatic(path, locale) {
  *   type   'conjunction' (and, the default) · 'disjunction' (or) · 'unit' (no conjunction)
  *   style  'long' (default) · 'short' · 'narrow'
  * Items are stringified. Where a browser has no Intl.ListFormat it falls back to ', ', today's behaviour.
+ * PICK THE TYPE FROM WHAT THE LIST MEANS. Several values on one filter facet are alternatives, so 'disjunction'
+ * (the chip bar: the bus matches with includes()). Things that all hold are a 'conjunction'. If a facet ever needs
+ * ALL its values, the type belongs in that facet's config, not fixed at the call site. Never 'unit' for names:
+ * in zh it joins them with no separator at all.
  */
 const listFormats = new Map()
 export function formatList(items, { type = 'conjunction', style = 'long', locale } = {}) {
diff --git a/plugin-designs/research-dashboard/scripts/check-legend-mirrors.mjs b/plugin-designs/research-dashboard/scripts/check-legend-mirrors.mjs
index b76f873df..a8cd87094 100644
--- a/plugin-designs/research-dashboard/scripts/check-legend-mirrors.mjs
+++ b/plugin-designs/research-dashboard/scripts/check-legend-mirrors.mjs
@@ -330,12 +330,19 @@ if (!fails.some((f) => f.startsWith('1'))) notes.push(`insets: ${SURFACES.length
     if (!lf) {
       fails.push('5  could not lift `const labelFor` out of the kit chip bar, so its unconfigured behaviour is whatever this gate can no longer see. Keep it one expression.')
     } else {
-      const make = (cfg) => new Function('cfg', `return ${lf[1]}`)(cfg)
+      // The chip joins a multi-value filter with library/i18n's formatList. It is LIFTED from index.js exactly
+      // as the chip's own expression is, so the gate drives the shipped list grammar, not a re-typed copy.
+      const i18nSrc = read('library/i18n/index.js') || ''
+      const flStart = i18nSrc.indexOf('const listFormats = new Map()')
+      const flEnd = i18nSrc.indexOf('\n}\n', i18nSrc.indexOf('export function formatList')) + 2
+      const formatList = new Function('getRuntimeLocale', 'detectLocale',
+        `${i18nSrc.slice(flStart, flEnd).replace('export function', 'function')}\nreturn formatList`)(() => '', () => 'en')
+      const make = (cfg) => new Function('cfg', 'formatList', `return ${lf[1]}`)(cfg, formatList)
       const bare = make({})
       if (bare('affinity_bloc', 'A012') !== 'A012') {
         fails.push('5  with NO resolver the kit chip bar does not pass a scalar value through — a dashboard that has not wired its code tables must see the code, not blank.')
       }
-      if (bare('religion', ['Islam', 'Hinduism']) !== 'Islam, Hinduism') {
+      if (bare('religion', ['Islam', 'Hinduism']) !== 'Islam or Hinduism') {
         fails.push(`5  with NO resolver a MULTI-VALUE filter (spec D1) renders as ${JSON.stringify(String(bare('religion', ['Islam', 'Hinduism'])))} instead of a joined list. Configured and unconfigured must differ in whether CODES RESOLVE, never in punctuation — a comma-jammed "A012,A013" reads as a rendering bug rather than as missing configuration.`)
       }
       const wired = make({ legend: { labelFor: () => 'SUPPLIED' } })