diff --git a/js/src/components/Participation/ParticipationWithoutAccount.vue b/js/src/components/Participation/ParticipationWithoutAccount.vue
index 2cdd79605..14a45b06e 100644
--- a/js/src/components/Participation/ParticipationWithoutAccount.vue
+++ b/js/src/components/Participation/ParticipationWithoutAccount.vue
@@ -1,6 +1,6 @@
 <template>
   <section class="container section hero is-fullheight">
-    <div class="hero-body">
+    <div class="hero-body" v-if="event">
       <div class="container">
         <form @submit.prevent="joinEvent">
           <p>
@@ -111,15 +111,22 @@ export default class ParticipationWithoutAccount extends Vue {
           actorId: this.config.anonymous.actorId,
           email: this.anonymousParticipation.email,
           message: this.anonymousParticipation.message,
+          locale: this.$i18n.locale,
         },
         update: (store, { data }) => {
-          if (data == null) return;
+          if (data == null) {
+            console.error("Cannot update event participant cache, because of data null value.");
+            return;
+          }
 
           const cachedData = store.readQuery<{ event: IEvent }>({
             query: FETCH_EVENT,
             variables: { uuid: this.event.uuid },
           });
-          if (cachedData == null) return;
+          if (cachedData == null) {
+            console.error("Cannot update event participant cache, because of cached null value.");
+            return;
+          }
           const { event } = cachedData;
           if (event === null) {
             console.error("Cannot update event participant cache, because of null value.");
@@ -132,6 +139,7 @@ export default class ParticipationWithoutAccount extends Vue {
             event.participantStats.going = event.participantStats.going + 1;
             event.participantStats.participant = event.participantStats.participant + 1;
           }
+          console.log("just before writequery");
 
           store.writeQuery({
             query: FETCH_EVENT,
@@ -140,23 +148,26 @@ export default class ParticipationWithoutAccount extends Vue {
           });
         },
       });
+      console.log("finished with store", data);
       if (data && data.joinEvent.metadata.cancellationToken) {
         await addLocalUnconfirmedAnonymousParticipation(
           this.event,
           data.joinEvent.metadata.cancellationToken
         );
-        return this.$router.push({
-          name: RouteName.EVENT,
-          params: { uuid: this.event.uuid },
-        });
+        console.log("done with crypto stuff");
       }
     } catch (e) {
-      console.log(JSON.stringify(e));
+      console.error(e);
       if (e.message === "GraphQL error: You are already a participant of this event") {
         this.error = this.$t(
           "This email is already registered as participant for this event"
         ) as string;
       }
+    } finally {
+      return this.$router.push({
+        name: RouteName.EVENT,
+        params: { uuid: this.event.uuid },
+      });
     }
   }
 }
diff --git a/js/src/graphql/event.ts b/js/src/graphql/event.ts
index 45f0ed735..dd26d4689 100644
--- a/js/src/graphql/event.ts
+++ b/js/src/graphql/event.ts
@@ -409,12 +409,13 @@ export const EDIT_EVENT = gql`
 `;
 
 export const JOIN_EVENT = gql`
-  mutation JoinEvent($eventId: ID!, $actorId: ID!, $email: String, $message: String) {
+  mutation JoinEvent($eventId: ID!, $actorId: ID!, $email: String, $message: String, $locale: String) {
     joinEvent(
       eventId: $eventId,
       actorId: $actorId,
       email: $email,
-      message: $message
+      message: $message,
+      locale: $locale
     ) {
         ${participantQuery}
     }
diff --git a/js/yarn.lock b/js/yarn.lock
index d30266b90..06e6ceb1c 100644
--- a/js/yarn.lock
+++ b/js/yarn.lock
@@ -1159,9 +1159,9 @@
   integrity sha512-6nlq2eEh75JegDGUXis9wGTYIJpUvbori4qx++PRKQsV3YRkaqUNPNykzphniqPSZADXCouBuAnyptjUkMkhvw==
 
 "@types/node@*", "@types/node@>=6":
-  version "14.0.11"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.0.11.tgz#61d4886e2424da73b7b25547f59fdcb534c165a3"
-  integrity sha512-lCvvI24L21ZVeIiyIUHZ5Oflv1hhHQ5E1S25IRlKIXaRkVgmXpJMI3wUJkmym2bTbCe+WoIibQnMVAU3FguaOg==
+  version "14.0.12"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.0.12.tgz#9c1d8ffb8084e8936603a6122a7649e40e68e04b"
+  integrity sha512-/sjzehvjkkpvLpYtN6/2dv5kg41otMGuHQUt9T2aiAuIfleCQRQHXXzF1eAw/qkZTj5Kcf4JSTf7EIizHocy6Q==
 
 "@types/normalize-package-data@^2.4.0":
   version "2.4.0"
@@ -1303,13 +1303,13 @@
     eslint-scope "^5.0.0"
     eslint-utils "^2.0.0"
 
-"@typescript-eslint/experimental-utils@3.1.0":
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-3.1.0.tgz#2d5dba7c2ac2a3da3bfa3f461ff64de38587a872"
-  integrity sha512-Zf8JVC2K1svqPIk1CB/ehCiWPaERJBBokbMfNTNRczCbQSlQXaXtO/7OfYz9wZaecNvdSvVADt6/XQuIxhC79w==
+"@typescript-eslint/experimental-utils@3.2.0":
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/experimental-utils/-/experimental-utils-3.2.0.tgz#4dab8fc9f44f059ec073470a81bb4d7d7d51e6c5"
+  integrity sha512-UbJBsk+xO9dIFKtj16+m42EvUvsjZbbgQ2O5xSTSfVT1Z3yGkL90DVu0Hd3029FZ5/uBgl+F3Vo8FAcEcqc6aQ==
   dependencies:
     "@types/json-schema" "^7.0.3"
-    "@typescript-eslint/typescript-estree" "3.1.0"
+    "@typescript-eslint/typescript-estree" "3.2.0"
     eslint-scope "^5.0.0"
     eslint-utils "^2.0.0"
 
@@ -1324,13 +1324,13 @@
     eslint-visitor-keys "^1.1.0"
 
 "@typescript-eslint/parser@^3.0.0":
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-3.1.0.tgz#9c02ba5d88ad2355672f39e6cd4176f172dd47f8"
-  integrity sha512-NcDSJK8qTA2tPfyGiPes9HtVKLbksmuYjlgGAUs7Ld2K0swdWibnCq9IJx9kJN8JJdgUJSorFiGaPHBgH81F/Q==
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/parser/-/parser-3.2.0.tgz#d9d7867456b1b8ecae9e724269b0bc932f06cbca"
+  integrity sha512-Vhu+wwdevDLVDjK1lIcoD6ZbuOa93fzqszkaO3iCnmrScmKwyW/AGkzc2UvfE5TCoCXqq7Jyt6SOXjsIlpqF4A==
   dependencies:
     "@types/eslint-visitor-keys" "^1.0.0"
-    "@typescript-eslint/experimental-utils" "3.1.0"
-    "@typescript-eslint/typescript-estree" "3.1.0"
+    "@typescript-eslint/experimental-utils" "3.2.0"
+    "@typescript-eslint/typescript-estree" "3.2.0"
     eslint-visitor-keys "^1.1.0"
 
 "@typescript-eslint/typescript-estree@2.34.0":
@@ -1346,10 +1346,10 @@
     semver "^7.3.2"
     tsutils "^3.17.1"
 
-"@typescript-eslint/typescript-estree@3.1.0":
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-3.1.0.tgz#eaff52d31e615e05b894f8b9d2c3d8af152a5dd2"
-  integrity sha512-+4nfYauqeQvK55PgFrmBWFVYb6IskLyOosYEmhH3mSVhfBp9AIJnjExdgDmKWoOBHRcPM8Ihfm2BFpZf0euUZQ==
+"@typescript-eslint/typescript-estree@3.2.0":
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-3.2.0.tgz#c735f1ca6b4d3cd671f30de8c9bde30843e7ead8"
+  integrity sha512-uh+Y2QO7dxNrdLw7mVnjUqkwO/InxEqwN0wF+Za6eo3coxls9aH9kQ/5rSvW2GcNanebRTmsT5w1/92lAOb1bA==
   dependencies:
     debug "^4.1.1"
     eslint-visitor-keys "^1.1.0"
@@ -4929,9 +4929,9 @@ ejs@^2.6.1:
   integrity sha512-7vmuyh5+kuUyJKePhQfRQBhXV5Ce+RnaeeQArKu1EAMpL3WbgMt5WG6uQZpEVvYSSsxMXRKOewtDk9RaTKXRlA==
 
 electron-to-chromium@^1.3.103, electron-to-chromium@^1.3.247, electron-to-chromium@^1.3.413:
-  version "1.3.464"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.464.tgz#fe13feaa08f6f865d3c89d5d72e54c194f463aa5"
-  integrity sha512-Oo+0+CN9d2z6FToQW6Hwvi9ez09Y/usKwr0tsDsyg43a871zVJCi1nR0v03djLbRNcaCKjtrnVf2XJhTxEpPCg==
+  version "1.3.465"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.465.tgz#d692e5c383317570c2bd82092a24a0308c6ccf29"
+  integrity sha512-K/lUeT3NLAsJ5SHRDhK3/zd0tw7OUllYD8w+fTOXm6ljCPsp2qq+vMzxpLo8u1M27ZjZAjRbsA6rirvne2nAMQ==
 
 elegant-spinner@^1.0.1:
   version "1.0.1"
@@ -6373,12 +6373,12 @@ globby@^9.2.0:
     slash "^2.0.0"
 
 globule@^1.0.0:
-  version "1.3.1"
-  resolved "https://registry.yarnpkg.com/globule/-/globule-1.3.1.tgz#90a25338f22b7fbeb527cee63c629aea754d33b9"
-  integrity sha512-OVyWOHgw29yosRHCHo7NncwR1hW5ew0W/UrvtwvjefVJeQ26q4/8r8FmPsSF1hJ93IgWkyv16pCTz6WblMzm/g==
+  version "1.3.2"
+  resolved "https://registry.yarnpkg.com/globule/-/globule-1.3.2.tgz#d8bdd9e9e4eef8f96e245999a5dee7eb5d8529c4"
+  integrity sha512-7IDTQTIu2xzXkT+6mlluidnWo+BypnbSoEVVQCGfzqnl5Ik8d3e1d4wycb8Rj9tWW+Z39uPWsdlquqiqPCd/pA==
   dependencies:
     glob "~7.1.1"
-    lodash "~4.17.12"
+    lodash "~4.17.10"
     minimatch "~3.0.2"
 
 glogg@^1.0.2:
@@ -8572,7 +8572,7 @@ lodash.uniq@^4.5.0:
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
   integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
 
-lodash@4.17.15, lodash@^4.0.0, lodash@^4.16.4, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.2, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.2.0, lodash@~4.17.12:
+lodash@4.17.15, lodash@^4.0.0, lodash@^4.16.4, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.2, lodash@^4.17.3, lodash@^4.17.4, lodash@^4.2.0, lodash@~4.17.10:
   version "4.17.15"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
   integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
@@ -13323,9 +13323,9 @@ thread-loader@^2.1.3:
     neo-async "^2.6.0"
 
 throttle-debounce@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/throttle-debounce/-/throttle-debounce-2.1.0.tgz#257e648f0a56bd9e54fe0f132c4ab8611df4e1d5"
-  integrity sha512-AOvyNahXQuU7NN+VVvOOX+uW6FPaWdAOdRP5HfwYxAfCzXTFKRMoIMk+n+po318+ktcChx+F1Dd91G3YHeMKyg==
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/throttle-debounce/-/throttle-debounce-2.2.1.tgz#fbd933ae6793448816f7d5b3cae259d464c98137"
+  integrity sha512-i9hAVld1f+woAiyNGqWelpDD5W1tpMroL3NofTz9xzwq6acWBlO2dC8k5EFSZepU6oOINtV5Q3aSPoRg7o4+fA==
 
 throttleit@^1.0.0:
   version "1.0.0"
@@ -14320,9 +14320,9 @@ vue-i18n-extract@^1.0.2:
     js-yaml "^3.13.1"
 
 vue-i18n@^8.14.0:
-  version "8.18.1"
-  resolved "https://registry.yarnpkg.com/vue-i18n/-/vue-i18n-8.18.1.tgz#2e683ac93a15617bdcd210f99359d6034e8425dd"
-  integrity sha512-K+hFQJksF8Ph23pnhbwSyoQx+4Y1q/rh2o7GiXI/3rLCCrwanUbzudC8+trp0Mb8rn9y83DYF6RXNrMd+VsuCw==
+  version "8.18.2"
+  resolved "https://registry.yarnpkg.com/vue-i18n/-/vue-i18n-8.18.2.tgz#cd7c12f2e178e6faa23b0e3cfd2f7bac9305f8fc"
+  integrity sha512-0X5nBTCZAVjlwcrPaYJwNs3iipBBTv0AUHwQUOa8yP3XbQGWKbRHqBb3OhCYtum/IHDD21d/df5Xd2VgyxbxfA==
 
 vue-inbrowser-compiler-utils@^4.23.3:
   version "4.23.3"
diff --git a/lib/graphql/resolvers/participant.ex b/lib/graphql/resolvers/participant.ex
index f00ea5a5e..019105194 100644
--- a/lib/graphql/resolvers/participant.ex
+++ b/lib/graphql/resolvers/participant.ex
@@ -69,7 +69,10 @@ defmodule Mobilizon.GraphQL.Resolvers.Participant do
            Config.anonymous_participation_email_confirmation_required?() do
         args
         |> Map.get(:email)
-        |> Email.Participation.anonymous_participation_confirmation(participant)
+        |> Email.Participation.anonymous_participation_confirmation(
+          participant,
+          Map.get(args, :locale, "en")
+        )
         |> Email.Mailer.deliver_later()
       end
 
diff --git a/lib/graphql/schema/events/participant.ex b/lib/graphql/schema/events/participant.ex
index 067c637af..3f1a44f7a 100644
--- a/lib/graphql/schema/events/participant.ex
+++ b/lib/graphql/schema/events/participant.ex
@@ -43,6 +43,7 @@ defmodule Mobilizon.GraphQL.Schema.Events.ParticipantType do
     )
 
     field(:message, :string, description: "The eventual message the participant left")
+    field(:locale, :string, description: "The participant's locale")
   end
 
   object :paginated_participant_list do
@@ -74,6 +75,7 @@ defmodule Mobilizon.GraphQL.Schema.Events.ParticipantType do
       arg(:actor_id, non_null(:id))
       arg(:email, :string)
       arg(:message, :string)
+      arg(:locale, :string)
 
       resolve(&Participant.actor_join_event/3)
     end
diff --git a/lib/mobilizon/events/participant.ex b/lib/mobilizon/events/participant.ex
index 5a309757c..a0885d1f6 100644
--- a/lib/mobilizon/events/participant.ex
+++ b/lib/mobilizon/events/participant.ex
@@ -24,7 +24,7 @@ defmodule Mobilizon.Events.Participant do
 
   @required_attrs [:url, :role, :event_id, :actor_id]
   @attrs @required_attrs
-  @metadata_attrs [:email, :confirmation_token, :cancellation_token, :message]
+  @metadata_attrs [:email, :confirmation_token, :cancellation_token, :message, :locale]
 
   @timestamps_opts [type: :utc_datetime]
 
@@ -38,6 +38,7 @@ defmodule Mobilizon.Events.Participant do
       field(:confirmation_token, :string)
       field(:cancellation_token, :string)
       field(:message, :string)
+      field(:locale, :string)
     end
 
     belongs_to(:event, Event, primary_key: true)
diff --git a/lib/web/email/participation.ex b/lib/web/email/participation.ex
index 93e2731a2..d2d246936 100644
--- a/lib/web/email/participation.ex
+++ b/lib/web/email/participation.ex
@@ -21,10 +21,11 @@ defmodule Mobilizon.Web.Email.Participation do
         %Participant{actor: %Actor{user_id: nil, id: actor_id} = _actor} = participation
       ) do
     if actor_id == Config.anonymous_actor_id() do
-      %{email: email} = Map.get(participation, :metadata)
+      %{email: email, locale: locale} = Map.get(participation, :metadata)
+      locale = locale || "en"
 
       email
-      |> participation_updated(participation)
+      |> participation_updated(participation, locale)
       |> Email.Mailer.deliver_later()
     end
 
@@ -37,9 +38,9 @@ defmodule Mobilizon.Web.Email.Participation do
   def send_emails_to_local_user(
         %Participant{actor: %Actor{user_id: user_id} = _actor} = participation
       ) do
-    with %User{} = user <- Users.get_user!(user_id) do
+    with %User{locale: locale} = user <- Users.get_user!(user_id) do
       user
-      |> participation_updated(participation)
+      |> participation_updated(participation, locale)
       |> Email.Mailer.deliver_later()
 
       :ok