diff --git a/js/src/i18n/en_US.json b/js/src/i18n/en_US.json
index 3f782a7e9..7f6846f41 100644
--- a/js/src/i18n/en_US.json
+++ b/js/src/i18n/en_US.json
@@ -301,7 +301,7 @@
 	"Your account has been validated": "Your account has been validated",
 	"Your account is being validated": "Your account is being validated",
 	"Your account is nearly ready, {username}": "Your account is nearly ready, {username}",
-	"Your local administrator resumed it's policy:": "Your local administrator resumed it's policy:",
+	"Your local administrator resumed its policy:": "Your local administrator resumed its policy:",
 	"Your participation has been confirmed": "Your participation has been confirmed",
 	"Your participation has been requested": "Your participation has been requested",
 	"a decentralised federation protocol": "a decentralised federation protocol",
diff --git a/js/src/i18n/fr_FR.json b/js/src/i18n/fr_FR.json
index eb5c80b9e..7d6c347a3 100644
--- a/js/src/i18n/fr_FR.json
+++ b/js/src/i18n/fr_FR.json
@@ -301,7 +301,7 @@
     "Your account has been validated": "Votre compte a été validé",
     "Your account is being validated": "Votre compte est en cours de validation",
     "Your account is nearly ready, {username}": "Votre compte est presque prêt, {username}",
-    "Your local administrator resumed it's policy:": "Votre administrateur local a résumé sa politique ainsi :",
+    "Your local administrator resumed its policy:": "Votre administrateur local a résumé sa politique ainsi :",
     "Your participation has been confirmed": "Votre participation a été confirmée",
     "Your participation has been requested": "Votre participation a été demandée",
     "a decentralised federation protocol": "un protocole de fédération décentralisée",
diff --git a/js/src/i18n/oc.json b/js/src/i18n/oc.json
index 31e37da73..933065bfd 100644
--- a/js/src/i18n/oc.json
+++ b/js/src/i18n/oc.json
@@ -226,7 +226,7 @@
     "Disallow promoting on Mobilizon": "Refusar la promocion sus Mobilizon",
     "with {identity}": "amb {identity}",
     "with another identity…": "amb una autra identitat…",
-    "Your local administrator resumed it's policy:": "Vòstre administrator local resumèt sa politica aital :",
+    "Your local administrator resumed its policy:": "Vòstre administrator local resumèt sa politica aital :",
     "Your account is nearly ready, {username}": "Vòstre compte es gaireben prèst, {username}",
     "You're not going to any event yet": "Avètz pas cap d’eveniment pel moment",
     "You have one event tomorrow.": "Avètz pas cap d’eveniment deman| Avètz un eveniment deman. | Avètz {count} eveniments deman",
diff --git a/js/src/views/User/Register.vue b/js/src/views/User/Register.vue
index b0ab3d1a9..8b220f2af 100644
--- a/js/src/views/User/Register.vue
+++ b/js/src/views/User/Register.vue
@@ -25,7 +25,7 @@
           <div class="content">
             <h2 class="title">{{ $t('About this instance') }}</h2>
             <p>
-              {{ $t("Your local administrator resumed it's policy:") }}
+              {{ $t("Your local administrator resumed its policy:") }}
             </p>
             <ul>
               <li>{{ $t('Enjoy discovering Mobilizon!') }}</li>
diff --git a/lib/mobilizon/media/media.ex b/lib/mobilizon/media/media.ex
index 2062ae074..7f9b6fe8e 100644
--- a/lib/mobilizon/media/media.ex
+++ b/lib/mobilizon/media/media.ex
@@ -24,7 +24,7 @@ defmodule Mobilizon.Media do
   def get_picture!(id), do: Repo.get!(Picture, id)
 
   @doc """
-  Get a picture by it's URL.
+  Get a picture by its URL.
   """
   @spec get_picture_by_url(String.t()) :: Picture.t() | nil
   def get_picture_by_url(url) do
diff --git a/lib/mobilizon_web/resolvers/event.ex b/lib/mobilizon_web/resolvers/event.ex
index e627d0cc4..dac24a98b 100644
--- a/lib/mobilizon_web/resolvers/event.ex
+++ b/lib/mobilizon_web/resolvers/event.ex
@@ -172,7 +172,7 @@ defmodule MobilizonWeb.Resolvers.Event do
       {:ok, participant}
     else
       {:maximum_attendee_capacity, _} ->
-        {:error, "The event has already reached it's maximum capacity"}
+        {:error, "The event has already reached its maximum capacity"}
 
       {:has_event, _} ->
         {:error, "Event with this ID #{inspect(event_id)} doesn't exist"}
@@ -329,7 +329,7 @@ defmodule MobilizonWeb.Resolvers.Event do
 
   # If we have an attached picture, just transmit it. It will be handled by
   # Mobilizon.Service.ActivityPub.Utils.make_picture_data/1
-  # However, we need to pass it's actor ID
+  # However, we need to pass its actor ID
   @spec save_attached_picture(map()) :: {:ok, map()}
   defp save_attached_picture(
          %{picture: %{picture: %{file: %Plug.Upload{} = _picture} = all_pic}} = args
diff --git a/lib/mobilizon_web/resolvers/user.ex b/lib/mobilizon_web/resolvers/user.ex
index af009dcb2..487ab2724 100644
--- a/lib/mobilizon_web/resolvers/user.ex
+++ b/lib/mobilizon_web/resolvers/user.ex
@@ -14,7 +14,7 @@ defmodule MobilizonWeb.Resolvers.User do
   require Logger
 
   @doc """
-  Find an user by it's ID
+  Find an user by its ID
   """
   def find_user(_parent, %{id: id}, _resolution) do
     Users.get_user_with_actors(id)
@@ -128,7 +128,7 @@ defmodule MobilizonWeb.Resolvers.User do
   end
 
   @doc """
-  Validate an user, get it's actor and a token
+  Validate an user, get its actor and a token
   """
   def validate_user(_parent, %{token: token}, _resolution) do
     with {:check_confirmation_token, {:ok, %User{} = user}} <-
diff --git a/lib/mobilizon_web/schema/actors/group.ex b/lib/mobilizon_web/schema/actors/group.ex
index f88192dd1..382df7f1c 100644
--- a/lib/mobilizon_web/schema/actors/group.ex
+++ b/lib/mobilizon_web/schema/actors/group.ex
@@ -89,7 +89,7 @@ defmodule MobilizonWeb.Schema.Actors.GroupType do
       resolve(&Group.list_groups/3)
     end
 
-    @desc "Get a group by it's preferred username"
+    @desc "Get a group by its preferred username"
     field :group, :group do
       arg(:preferred_username, non_null(:string))
       resolve(&Group.find_group/3)
diff --git a/lib/mobilizon_web/schema/actors/person.ex b/lib/mobilizon_web/schema/actors/person.ex
index 7052cdd89..bcddea046 100644
--- a/lib/mobilizon_web/schema/actors/person.ex
+++ b/lib/mobilizon_web/schema/actors/person.ex
@@ -70,13 +70,13 @@ defmodule MobilizonWeb.Schema.Actors.PersonType do
       resolve(&Person.get_current_person/3)
     end
 
-    @desc "Get a person by it's (federated) username"
+    @desc "Get a person by its (federated) username"
     field :fetch_person, :person do
       arg(:preferred_username, non_null(:string))
       resolve(&Person.fetch_person/3)
     end
 
-    @desc "Get a person by it's ID"
+    @desc "Get a person by its ID"
     field :person, :person do
       arg(:id, non_null(:id))
       resolve(&Person.get_person/3)
diff --git a/lib/service/activity_pub/activity_pub.ex b/lib/service/activity_pub/activity_pub.ex
index 181807b82..9b5426328 100644
--- a/lib/service/activity_pub/activity_pub.ex
+++ b/lib/service/activity_pub/activity_pub.ex
@@ -480,7 +480,7 @@ defmodule Mobilizon.Service.ActivityPub do
   end
 
   @doc """
-  Create an actor locally by it's URL (AP ID)
+  Create an actor locally by its URL (AP ID)
   """
   @spec make_actor_from_url(String.t(), boolean()) :: {:ok, %Actor{}} | {:error, any()}
   def make_actor_from_url(url, preload \\ false) do
@@ -520,7 +520,7 @@ defmodule Mobilizon.Service.ActivityPub do
   def find_or_make_group_from_nickname(nick), do: find_or_make_actor_from_nickname(nick, :Group)
 
   @doc """
-  Create an actor inside our database from username, using WebFinger to find out it's AP ID and then fetch it
+  Create an actor inside our database from username, using WebFinger to find out its AP ID and then fetch it
   """
   @spec make_actor_from_nickname(String.t()) :: {:ok, %Actor{}} | {:error, any()}
   def make_actor_from_nickname(nickname) do
@@ -611,7 +611,7 @@ defmodule Mobilizon.Service.ActivityPub do
     )
   end
 
-  # Fetching a remote actor's information through it's AP ID
+  # Fetching a remote actor's information through its AP ID
   @spec fetch_and_prepare_actor_from_url(String.t()) :: {:ok, struct()} | {:error, atom()} | any()
   defp fetch_and_prepare_actor_from_url(url) do
     Logger.debug("Fetching and preparing actor from url")
diff --git a/lib/service/export/feed.ex b/lib/service/export/feed.ex
index 77ff71424..ae0f3f2bc 100644
--- a/lib/service/export/feed.ex
+++ b/lib/service/export/feed.ex
@@ -54,7 +54,7 @@ defmodule Mobilizon.Service.Export.Feed do
     end
   end
 
-  # Build an atom feed from actor and it's public events
+  # Build an atom feed from actor and its public events
   @spec build_actor_feed(Actor.t(), list(), boolean()) :: String.t()
   defp build_actor_feed(%Actor{} = actor, events, public \\ true) do
     display_name = Actor.display_name(actor)
@@ -159,7 +159,7 @@ defmodule Mobilizon.Service.Export.Feed do
     |> Enum.map(&Events.get_event_with_preload!/1)
   end
 
-  # Build an atom feed from actor and it's public events
+  # Build an atom feed from actor and its public events
   @spec build_user_feed(list(), User.t(), String.t()) :: String.t()
   defp build_user_feed(events, %User{email: email}, token) do
     self_url = Endpoint |> Routes.feed_url(:going, token, "atom") |> URI.decode()
diff --git a/schema.graphql b/schema.graphql
index 9e139a44a..5b70032ef 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -1134,10 +1134,10 @@ type RootQueryType {
   """Get all events"""
   events(limit: Int = 10, page: Int = 1): [Event]
 
-  """Get a person by it's (federated) username"""
+  """Get a person by its (federated) username"""
   fetchPerson(preferredUsername: String!): Person
 
-  """Get a group by it's preferred username"""
+  """Get a group by its preferred username"""
   group(preferredUsername: String!): Group
 
   """Get all groups"""
@@ -1152,7 +1152,7 @@ type RootQueryType {
   """Get the current user"""
   loggedUser: User
 
-  """Get a person by it's ID"""
+  """Get a person by its ID"""
   person(id: ID!): Person
 
   """Get a picture"""
diff --git a/test/mobilizon/actors/actors_test.exs b/test/mobilizon/actors/actors_test.exs
index 2727f4d17..119149290 100644
--- a/test/mobilizon/actors/actors_test.exs
+++ b/test/mobilizon/actors/actors_test.exs
@@ -72,7 +72,7 @@ defmodule Mobilizon.ActorsTest do
       assert actor_id == Users.get_actor_for_user(user).id
     end
 
-    test "get_actor_with_preload/1 returns the actor with it's organized events", %{
+    test "get_actor_with_preload/1 returns the actor with its organized events", %{
       actor: actor
     } do
       assert Actors.get_actor_with_preload(actor.id).organized_events == []
@@ -113,7 +113,7 @@ defmodule Mobilizon.ActorsTest do
       end
     end
 
-    test "get_local_actor_by_name_with_preload!/1 returns the local actor with it's organized events",
+    test "get_local_actor_by_name_with_preload!/1 returns the local actor with its organized events",
          %{
            actor: actor
          } do
@@ -130,7 +130,7 @@ defmodule Mobilizon.ActorsTest do
       assert event_found_id == event.id
     end
 
-    test "get_actor_by_name_with_preload!/1 returns the local actor with it's organized events",
+    test "get_actor_by_name_with_preload!/1 returns the local actor with its organized events",
          %{
            actor: actor
          } do
@@ -147,7 +147,7 @@ defmodule Mobilizon.ActorsTest do
       assert event_found_id == event.id
     end
 
-    test "get_actor_by_name_with_preload!/1 returns the remote actor with it's organized events" do
+    test "get_actor_by_name_with_preload!/1 returns the remote actor with its organized events" do
       use_cassette "actors/remote_actor_mastodon_tcit" do
         with {:ok, %Actor{} = actor} <- ActivityPub.get_or_fetch_by_url(@remote_account_url) do
           assert Actors.get_actor_by_name_with_preload(
@@ -230,7 +230,7 @@ defmodule Mobilizon.ActorsTest do
       refute actor.suspended
     end
 
-    test "update_actor/2 with valid data updates the actor and it's media files", %{
+    test "update_actor/2 with valid data updates the actor and its media files", %{
       actor: %Actor{avatar: %{url: avatar_url}, banner: %{url: banner_url}} = actor
     } do
       %URI{path: "/media/" <> avatar_path} = URI.parse(avatar_url)
diff --git a/test/mobilizon/service/activity_pub/activity_pub_test.exs b/test/mobilizon/service/activity_pub/activity_pub_test.exs
index 59583ecf4..be66f851e 100644
--- a/test/mobilizon/service/activity_pub/activity_pub_test.exs
+++ b/test/mobilizon/service/activity_pub/activity_pub_test.exs
@@ -42,7 +42,7 @@ defmodule Mobilizon.Service.ActivityPub.ActivityPubTest do
     end
   end
 
-  describe "fetching actor from it's url" do
+  describe "fetching actor from its url" do
     test "returns an actor from nickname" do
       use_cassette "activity_pub/fetch_tcit@framapiaf.org" do
         assert {:ok, %Actor{preferred_username: "tcit", domain: "framapiaf.org"} = actor} =
diff --git a/test/mobilizon/users/users_test.exs b/test/mobilizon/users/users_test.exs
index bb43805ab..8e901e456 100644
--- a/test/mobilizon/users/users_test.exs
+++ b/test/mobilizon/users/users_test.exs
@@ -74,7 +74,7 @@ defmodule Mobilizon.UsersTest do
                Users.authenticate(%{user: user, password: "bad password"})
     end
 
-    test "get_user_by_email/1 finds an user by it's email" do
+    test "get_user_by_email/1 finds an user by its email" do
       {:ok, %User{email: email} = user} = Users.register(%{email: @email, password: @password})
 
       assert email == @email
@@ -83,7 +83,7 @@ defmodule Mobilizon.UsersTest do
       assert {:error, :user_not_found} = Users.get_user_by_email("no email")
     end
 
-    test "get_user_by_email/1 finds an activated user by it's email" do
+    test "get_user_by_email/1 finds an activated user by its email" do
       {:ok, %User{} = user} = Users.register(%{email: @email, password: @password})
 
       {:ok, %User{id: id}} = Users.get_user_by_email(@email, false)
diff --git a/test/mobilizon_web/resolvers/group_resolver_test.exs b/test/mobilizon_web/resolvers/group_resolver_test.exs
index 784aa0de0..e7bff0607 100644
--- a/test/mobilizon_web/resolvers/group_resolver_test.exs
+++ b/test/mobilizon_web/resolvers/group_resolver_test.exs
@@ -106,7 +106,7 @@ defmodule MobilizonWeb.Resolvers.GroupResolverTest do
                group.preferred_username
     end
 
-    test "find_group/3 returns a group by it's username", context do
+    test "find_group/3 returns a group by its username", context do
       group = insert(:group)
 
       query = """
diff --git a/test/mobilizon_web/resolvers/participant_resolver_test.exs b/test/mobilizon_web/resolvers/participant_resolver_test.exs
index bd195d47c..75c6e2d8c 100644
--- a/test/mobilizon_web/resolvers/participant_resolver_test.exs
+++ b/test/mobilizon_web/resolvers/participant_resolver_test.exs
@@ -141,7 +141,7 @@ defmodule MobilizonWeb.Resolvers.ParticipantResolverTest do
         |> post("/api", AbsintheHelpers.mutation_skeleton(mutation))
 
       assert hd(json_response(res, 200)["errors"])["message"] ==
-               "The event has already reached it's maximum capacity"
+               "The event has already reached its maximum capacity"
     end
 
     test "actor_join_event/3 should check the actor is owned by the user", %{
diff --git a/test/mobilizon_web/resolvers/person_resolver_test.exs b/test/mobilizon_web/resolvers/person_resolver_test.exs
index 49d027aa9..b8cd88d73 100644
--- a/test/mobilizon_web/resolvers/person_resolver_test.exs
+++ b/test/mobilizon_web/resolvers/person_resolver_test.exs
@@ -7,7 +7,7 @@ defmodule MobilizonWeb.Resolvers.PersonResolverTest do
   @non_existent_username "nonexistent"
 
   describe "Person Resolver" do
-    test "get_person/3 returns a person by it's username", context do
+    test "get_person/3 returns a person by its username", context do
       user = insert(:user)
       actor = insert(:actor, user: user)
 
@@ -44,7 +44,7 @@ defmodule MobilizonWeb.Resolvers.PersonResolverTest do
                "Person with ID 6895567 not found"
     end
 
-    test "find_person/3 returns a person by it's username", context do
+    test "find_person/3 returns a person by its username", context do
       user = insert(:user)
       actor = insert(:actor, user: user)
 
diff --git a/test/mobilizon_web/resolvers/user_resolver_test.exs b/test/mobilizon_web/resolvers/user_resolver_test.exs
index 701cb44f8..c8418df0b 100644
--- a/test/mobilizon_web/resolvers/user_resolver_test.exs
+++ b/test/mobilizon_web/resolvers/user_resolver_test.exs
@@ -18,7 +18,7 @@ defmodule MobilizonWeb.Resolvers.UserResolverTest do
   @valid_single_actor_params %{preferred_username: "test2", keys: "yolo"}
 
   describe "Resolver: Get an user" do
-    test "find_user/3 returns an user by it's id", context do
+    test "find_user/3 returns an user by its id", context do
       user = insert(:user)
 
       query = """