diff --git a/.env.example b/.env.example
index 0119d7e..c92c023 100644
--- a/.env.example
+++ b/.env.example
@@ -28,6 +28,12 @@ VITE_PUSH_NOTIFICATIONS_ENABLED=true
 # Image Upload Configuration (pict-rs)
 VITE_PICTRS_BASE_URL=https://img.mydomain.com
 
+# Activities / Sortir Configuration
+# Default language for the standalone activities app (fr, en, es)
+VITE_DEFAULT_LOCALE=fr
+# Default map center as "lat,lng" (defaults to France center if not set)
+VITE_DEFAULT_MAP_CENTER=42.9667,1.6000
+
 # Market Configuration
 VITE_MARKET_NADDR=naddr1qqjxgdp4vv6rydej943n2dny956rwwf4943xzwfc95ekyd3evenrsvrrvc6r2qf8waehxw309akxucnfw3ejuct5d96xcctw9e5k7tmwdaehgunjv4kxz7f0v96xjmczyqrfrfkxv3m8t4elpe28x065z30zszaaqa4u0744qcmadsz3y50cjqcyqqq82scmcafla
 # OBSOLETE: Not used in codebase - market uses VITE_NOSTR_RELAYS instead
diff --git a/src/activities-app/app.config.ts b/src/activities-app/app.config.ts
index 30cbb22..eaada70 100644
--- a/src/activities-app/app.config.ts
+++ b/src/activities-app/app.config.ts
@@ -1,5 +1,12 @@
 import type { AppConfig } from '@/core/types'
 
+function parseMapCenter(envValue: string | undefined, fallback: { lat: number; lng: number }) {
+  if (!envValue) return fallback
+  const [lat, lng] = envValue.split(',').map(Number)
+  if (isNaN(lat) || isNaN(lng)) return fallback
+  return { lat, lng }
+}
+
 /**
  * Standalone activities app configuration.
  * Only enables base + activities modules.
@@ -36,7 +43,7 @@ export const appConfig: AppConfig = {
           baseUrl: import.meta.env.VITE_LNBITS_BASE_URL || 'http://localhost:5000',
           apiKey: import.meta.env.VITE_API_KEY || ''
         },
-        defaultMapCenter: { lat: 42.9667, lng: 1.6000 }, // Ariège, France
+        defaultMapCenter: parseMapCenter(import.meta.env.VITE_DEFAULT_MAP_CENTER, { lat: 42.9667, lng: 1.6000 }),
         maxTicketsPerUser: 10,
         enableMap: true,
         enablePrivateEvents: false
diff --git a/src/activities-app/app.ts b/src/activities-app/app.ts
index e997b9b..6375cf0 100644
--- a/src/activities-app/app.ts
+++ b/src/activities-app/app.ts
@@ -12,7 +12,7 @@ import activitiesModule from '@/modules/activities'
 import App from './App.vue'
 
 import '@/assets/index.css'
-import { i18n } from '@/i18n'
+import { i18n, changeLocale, type AvailableLocale } from '@/i18n'
 
 /**
  * Initialize the standalone activities app
@@ -59,6 +59,12 @@ export async function createAppInstance() {
   app.use(pinia)
   app.use(i18n)
 
+  // Set default locale from env (user's saved preference takes priority via useStorage in i18n)
+  const defaultLocale = import.meta.env.VITE_DEFAULT_LOCALE as AvailableLocale | undefined
+  if (defaultLocale && !localStorage.getItem('user-locale')) {
+    await changeLocale(defaultLocale)
+  }
+
   // Initialize plugin manager
   pluginManager.init(app, router)
 
diff --git a/src/app.config.ts b/src/app.config.ts
index 11e2df8..5fe63b2 100644
--- a/src/app.config.ts
+++ b/src/app.config.ts
@@ -1,5 +1,12 @@
 import type { AppConfig } from './core/types'
 
+function parseMapCenter(envValue: string | undefined, fallback: { lat: number; lng: number }) {
+  if (!envValue) return fallback
+  const [lat, lng] = envValue.split(',').map(Number)
+  if (isNaN(lat) || isNaN(lng)) return fallback
+  return { lat, lng }
+}
+
 export const appConfig: AppConfig = {
   modules: {
     base: {
@@ -84,7 +91,7 @@ export const appConfig: AppConfig = {
           baseUrl: import.meta.env.VITE_LNBITS_BASE_URL || 'http://localhost:5000',
           apiKey: import.meta.env.VITE_API_KEY || ''
         },
-        defaultMapCenter: { lat: 46.6034, lng: 1.8883 },
+        defaultMapCenter: parseMapCenter(import.meta.env.VITE_DEFAULT_MAP_CENTER, { lat: 46.6034, lng: 1.8883 }),
         maxTicketsPerUser: 10,
         enableMap: true,
         enablePrivateEvents: false
diff --git a/src/modules/activities/views/ActivitiesMapPage.vue b/src/modules/activities/views/ActivitiesMapPage.vue
index 566146b..4a7d533 100644
--- a/src/modules/activities/views/ActivitiesMapPage.vue
+++ b/src/modules/activities/views/ActivitiesMapPage.vue
@@ -6,6 +6,16 @@ import ActivityMap from '../components/ActivityMap.vue'
 
 const { allActivities, isLoading, subscribe } = useActivities()
 
+function parseMapCenter(): { lat: number; lng: number } | undefined {
+  const raw = import.meta.env.VITE_DEFAULT_MAP_CENTER
+  if (!raw) return undefined
+  const [lat, lng] = raw.split(',').map(Number)
+  if (isNaN(lat) || isNaN(lng)) return undefined
+  return { lat, lng }
+}
+
+const mapCenter = parseMapCenter()
+
 const geoActivities = computed(() =>
   allActivities.value.filter(a => a.coordinates)
 )
@@ -33,6 +43,7 @@ onMounted(() => {
     <ActivityMap
       v-else
       :activities="geoActivities"
+      :center="mapCenter"
       class="flex-1"
     />