diff --git a/apps/transport/lib/validators/gtfs_transport_validator.ex b/apps/transport/lib/validators/gtfs_transport_validator.ex
index 6ef05a8485..c309faa03d 100644
--- a/apps/transport/lib/validators/gtfs_transport_validator.ex
+++ b/apps/transport/lib/validators/gtfs_transport_validator.ex
@@ -76,6 +76,18 @@ defmodule Transport.Validators.GTFSTransport do
     end
   end
 
+  @doc """
+  iex> Gettext.put_locale("en")
+  iex> format_severity("Fatal", 1)
+  "1 fatal failure"
+  iex> format_severity("Fatal", 2)
+  "2 fatal failures"
+  iex> Gettext.put_locale("fr")
+  iex> format_severity("Fatal", 1)
+  "1 échec irrécupérable"
+  iex> format_severity("Fatal", 2)
+  "2 échecs irrécupérables"
+  """
   @spec format_severity(binary(), non_neg_integer()) :: binary()
   def format_severity(key, count) do
     case key do
diff --git a/apps/transport/lib/validators/netex_validator.ex b/apps/transport/lib/validators/netex_validator.ex
index 179a76fb58..095b49726f 100644
--- a/apps/transport/lib/validators/netex_validator.ex
+++ b/apps/transport/lib/validators/netex_validator.ex
@@ -191,6 +191,18 @@ defmodule Transport.Validators.NeTEx do
     end
   end
 
+  @doc """
+  iex> Gettext.put_locale("en")
+  iex> format_severity("error", 1)
+  "1 error"
+  iex> format_severity("error", 2)
+  "2 errors"
+  iex> Gettext.put_locale("fr")
+  iex> format_severity("error", 1)
+  "1 erreur"
+  iex> format_severity("error", 2)
+  "2 erreurs"
+  """
   @spec format_severity(binary(), non_neg_integer()) :: binary()
   def format_severity(key, count) do
     case key do
diff --git a/apps/transport/priv/gettext/fr/LC_MESSAGES/gtfs-transport-validator.po b/apps/transport/priv/gettext/fr/LC_MESSAGES/gtfs-transport-validator.po
index 78145bd411..ed13957236 100644
--- a/apps/transport/priv/gettext/fr/LC_MESSAGES/gtfs-transport-validator.po
+++ b/apps/transport/priv/gettext/fr/LC_MESSAGES/gtfs-transport-validator.po
@@ -162,23 +162,23 @@ msgstr "Temps d'arrêt négatif"
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Error"
 msgid_plural "Errors"
-msgstr[0] "%{count} Erreurs"
-msgstr[1] "%{count} Erreurs"
+msgstr[0] "%{count} erreur"
+msgstr[1] "%{count} erreurs"
 
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Fatal failure"
 msgid_plural "Fatal failures"
-msgstr[0] "%{count} échecs irrécupérables"
+msgstr[0] "%{count} échec irrécupérable"
 msgstr[1] "%{count} échecs irrécupérables"
 
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Information"
 msgid_plural "Informations"
-msgstr[0] "%{count} informations"
+msgstr[0] "%{count} information"
 msgstr[1] "%{count} informations"
 
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Warning"
 msgid_plural "Warnings"
-msgstr[0] "%{count} avertissements"
+msgstr[0] "%{count} avertissement"
 msgstr[1] "%{count} avertissements"