diff --git a/config/config.exs b/config/config.exs
index 9f125f79e..1830afcd9 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -179,6 +179,8 @@ config :phoenix, :filter_parameters, ["password", "token"]
 config :absinthe, schema: Mobilizon.GraphQL.Schema
 config :absinthe, Absinthe.Logger, filter_variables: ["token", "password", "secret"]
 
+config :mobilizon, Mobilizon.Web.Gettext, one_module_per_locale: true
+
 config :ex_cldr,
   default_locale: "en",
   default_backend: Mobilizon.Cldr
diff --git a/config/dev.exs b/config/dev.exs
index 660e6dd58..291bdc463 100644
--- a/config/dev.exs
+++ b/config/dev.exs
@@ -58,6 +58,8 @@ config :logger, :console, format: "[$level] $message\n", level: :debug
 
 config :mobilizon, Mobilizon.Service.Geospatial, service: Mobilizon.Service.Geospatial.Nominatim
 
+config :mobilizon, Mobilizon.Web.Gettext, allowed_locales: ["fr", "en"]
+
 # Set a higher stacktrace during development. Avoid configuring such
 # in production as building large stacktraces may be expensive.
 config :phoenix, :stacktrace_depth, 20
diff --git a/config/test.exs b/config/test.exs
index 4f024d17c..788b683f6 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -77,6 +77,8 @@ config :mobilizon, Mobilizon.Web.Auth.Guardian, secret_key: "some secret"
 
 config :mobilizon, :activitypub, sign_object_fetches: false
 
+config :mobilizon, Mobilizon.Web.Gettext, allowed_locales: ["fr", "en"]
+
 config :junit_formatter, report_dir: "."
 
 if System.get_env("DOCKER", "false") == "false" && File.exists?("./config/test.secret.exs") do