diff --git a/sbc_translation/__manifest__.py b/sbc_translation/__manifest__.py
index 6f214f104..219f83b4e 100644
--- a/sbc_translation/__manifest__.py
+++ b/sbc_translation/__manifest__.py
@@ -28,7 +28,7 @@
 # pylint: disable=C8101
 {
     "name": "SBC Translation Platform",
-    "version": "18.0.1.0.0",
+    "version": "18.0.1.1.0",
     "category": "Compassion",
     "summary": "SBC - Translation Platform",
     "sequence": 150,
diff --git a/sbc_translation/migrations/18.0.1.1.0/post-migration.py b/sbc_translation/migrations/18.0.1.1.0/post-migration.py
new file mode 100644
index 000000000..83a12b085
--- /dev/null
+++ b/sbc_translation/migrations/18.0.1.1.0/post-migration.py
@@ -0,0 +1,34 @@
+# sbc_translation/migrations/18.0.1.1.0/post-migration.py
+
+from odoo import SUPERUSER_ID, api
+
+
+def migrate(cr, version):
+    """
+    Migration script to force the recalculation of translation statistics
+    for existing users when updating the module.
+    """
+    env = api.Environment(cr, SUPERUSER_ID, {})
+
+    translators = env["translation.user"].search([])
+
+    if not translators:
+        return
+
+    env.add_to_compute(
+        env["translation.user"]._fields["nb_translated_letters"], translators
+    )
+    env.add_to_compute(
+        env["translation.user"]._fields["nb_translated_letters_this_year"], translators
+    )
+    env.add_to_compute(
+        env["translation.user"]._fields["nb_translated_letters_last_year"], translators
+    )
+
+    translators.flush_model(
+        [
+            "nb_translated_letters",
+            "nb_translated_letters_this_year",
+            "nb_translated_letters_last_year",
+        ]
+    )
diff --git a/sbc_translation/models/translation_user.py b/sbc_translation/models/translation_user.py
index 2b54ac2c5..644edb416 100644
--- a/sbc_translation/models/translation_user.py
+++ b/sbc_translation/models/translation_user.py
@@ -53,29 +53,68 @@ class TranslationUser(models.Model):
         ("unique_translator", "unique(user_id)", "This translator already exists.")
     ]
 
-    @api.depends("translated_letter_ids")
+    @api.depends("translated_letter_ids.translation_status")
     def _compute_nb_translated_letters(self):
+        groups = self.env["correspondence"].read_group(
+            [
+                ("new_translator_id", "in", self.ids),
+                ("translation_status", "=", "done"),
+            ],
+            ["new_translator_id"],
+            ["new_translator_id"],
+        )
+        mapped_data = {
+            g["new_translator_id"][0]: g["new_translator_id_count"] for g in groups
+        }
         for translator in self:
-            translator.nb_translated_letters = len(translator.translated_letter_ids)
+            translator.nb_translated_letters = mapped_data.get(translator.id, 0)
 
-    @api.depends("translated_letter_ids")
+    @api.depends(
+        "translated_letter_ids.translation_status",
+        "translated_letter_ids.translate_done",
+    )
     def _compute_nb_translated_letters_this_year(self):
+        current_year = fields.Datetime.now().year
+        groups = self.env["correspondence"].read_group(
+            [
+                ("new_translator_id", "in", self.ids),
+                ("translation_status", "=", "done"),
+                ("translate_done", ">=", f"{current_year}-01-01 00:00:00"),
+                ("translate_done", "<", f"{current_year + 1}-01-01 00:00:00"),
+            ],
+            ["new_translator_id"],
+            ["new_translator_id"],
+        )
+        mapped_data = {
+            g["new_translator_id"][0]: g["new_translator_id_count"] for g in groups
+        }
         for translator in self:
-            translator.nb_translated_letters_this_year = len(
-                translator.translated_letter_ids.filtered(
-                    lambda it: it.translate_date
-                    and it.translate_date.year == fields.Datetime.now().year
-                )
+            translator.nb_translated_letters_this_year = mapped_data.get(
+                translator.id, 0
             )
 
-    @api.depends("translated_letter_ids")
+    @api.depends(
+        "translated_letter_ids.translation_status",
+        "translated_letter_ids.translate_done",
+    )
     def _compute_nb_translated_letters_last_year(self):
+        last_year = fields.Datetime.now().year - 1
+        groups = self.env["correspondence"].read_group(
+            [
+                ("new_translator_id", "in", self.ids),
+                ("translation_status", "=", "done"),
+                ("translate_done", ">=", f"{last_year}-01-01 00:00:00"),
+                ("translate_done", "<", f"{last_year + 1}-01-01 00:00:00"),
+            ],
+            ["new_translator_id"],
+            ["new_translator_id"],
+        )
+        mapped_data = {
+            g["new_translator_id"][0]: g["new_translator_id_count"] for g in groups
+        }
         for translator in self:
-            translator.nb_translated_letters_last_year = len(
-                translator.translated_letter_ids.filtered(
-                    lambda it: it.translate_date
-                    and it.translate_date.year == fields.Datetime.now().year - 1
-                )
+            translator.nb_translated_letters_last_year = mapped_data.get(
+                translator.id, 0
             )
 
     @api.model_create_multi