diff --git a/src/i18n.py b/src/i18n.py
new file mode 100644
index 0000000..1b9baa0
--- /dev/null
+++ b/src/i18n.py
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: LGPL-2.1-only
+# Copyright 2022 Jookia <contact@jookia.org>
+
+
+class Message:
+    def __init__(self, id, values):
+        self.id = id
+        self.values = values
+
+    def __repr__(self):
+        return "Message('%s', %s)" % (self.id, self.values)
+
+    def __eq__(self, other):
+        return self.id == other.id and self.values == other.values
diff --git a/tests/test_i18n.py b/tests/test_i18n.py
new file mode 100644
index 0000000..189f04c
--- /dev/null
+++ b/tests/test_i18n.py
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: LGPL-2.1-only
+# Copyright 2022 Jookia <contact@jookia.org>
+
+# The i18n module provides the following:
+# - A Message data structure
+#
+# The Message data structure contains:
+# - A string identifier
+# - A dictionary of string keys to arbitrary values
+
+from hypothesis.strategies import (
+    binary,
+    composite,
+    lists,
+    text,
+)
+
+from src.i18n import Message
+from tests.templates import template_test_structure
+
+
+# Draws a message identifier
+@composite
+def draw_message_identifier(draw):
+    return draw(text())
+
+
+# Draws a message key and value
+@composite
+def draw_message_keyvalue(draw):
+    return (draw(text()), draw(binary()))
+
+
+# Draws a values for a message
+@composite
+def draw_message_values(draw):
+    values = {}
+    keyvalues = draw(lists(draw_message_keyvalue()))
+    for (key, value) in keyvalues:
+        values[key] = value
+    return values
+
+
+# Draws a random message
+@composite
+def draw_message_random(draw):
+    id = draw(draw_message_identifier())
+    values = draw(draw_message_values())
+    return Message(id, values)
+
+
+# Test message structure
+@template_test_structure(
+    Message,
+    draw_message_random(),
+    id=draw_message_identifier(),
+    values=draw_message_values(),
+)
+def test_i18n_message_structure():
+    pass