diff --git a/src/unittests/common/CMakeLists.txt b/src/unittests/common/CMakeLists.txt
index 8bc9e4ef7..321493cfd 100644
--- a/src/unittests/common/CMakeLists.txt
+++ b/src/unittests/common/CMakeLists.txt
@@ -7,3 +7,10 @@ create_test(
   SOURCE SettingsTests.cpp
   WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/src/lib/common"
 )
+
+create_test(
+  NAME I18NTests
+  DEPENDS common
+  SOURCE I18NTests.cpp
+  WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/src/lib/common"
+)
diff --git a/src/unittests/common/I18NTests.cpp b/src/unittests/common/I18NTests.cpp
new file mode 100644
index 000000000..22aead362
--- /dev/null
+++ b/src/unittests/common/I18NTests.cpp
@@ -0,0 +1,86 @@
+/*
+ * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Chris Rizzitello <sithlord48@gmail.com>
+ * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
+ */
+
+#include "I18NTests.h"
+
+#include "common/I18N.h"
+#include "common/Settings.h"
+#include <QDir>
+#include <QFile>
+#include <QSignalSpy>
+
+void I18NTests::initTestCase()
+{
+  QFile oldSettings(m_settingsFile);
+  if (oldSettings.exists())
+    oldSettings.remove();
+  Settings::setSettingsFile(m_settingsFile);
+  Settings::setStateFile(m_stateFile);
+
+  m_myTDir = QStringLiteral("%1/translations").arg(QCoreApplication::applicationDirPath());
+  const auto srcTDir = QStringLiteral("%1/../../../translations").arg(QCoreApplication::applicationDirPath());
+
+  QDir dir;
+  if (dir.exists(m_myTDir)) {
+    dir.setPath(m_myTDir);
+    dir.removeRecursively();
+  }
+
+  dir.mkdir(m_myTDir);
+  dir.setPath(srcTDir);
+  for (const auto &file : dir.entryList({"deskflow_*.qm"}, QDir::Files, QDir::Name)) {
+    QFile::copy(QStringLiteral("%1/%2").arg(srcTDir, file), QStringLiteral("%1/%2").arg(m_myTDir, file));
+    QVERIFY(QFile::exists(QStringLiteral("%1/%2").arg(m_myTDir, file)));
+  }
+}
+
+void I18NTests::creationTest()
+{
+  QVERIFY(I18N::instance());
+}
+
+void I18NTests::detectedLangTest()
+{
+  for (const auto &lang : I18N::detectedLanguages())
+    QVERIFY(m_langMap.contains(lang));
+}
+
+void I18NTests::check639NameTest()
+{
+  for (const auto &lang : m_langMap.keys())
+    QCOMPARE(I18N::nativeTo639Name(lang), m_langMap.value(lang));
+}
+
+void I18NTests::toNativeNameTest()
+{
+  for (const auto &lang : m_langMap.values())
+    QCOMPARE(I18N::toNativeName(lang), m_langMap.key(lang));
+}
+
+void I18NTests::setLangTest()
+{
+  QSignalSpy spy(I18N::instance(), &I18N::languageChanged);
+  for (const auto &lang : m_langMap.values()) {
+    I18N::setLanguage(lang);
+    QCOMPARE(I18N::currentLanguage(), lang);
+  }
+  QCOMPARE(spy.count(), m_langMap.count());
+}
+
+void I18NTests::reDetectTest()
+{
+  QSignalSpy spy(I18N::instance(), &I18N::langaugesChanged);
+
+  I18N::reDetectLanguages();
+  QCOMPARE(spy.count(), 0);
+
+  QFile::remove(QStringLiteral("%1/deskflow_en.qm").arg(m_myTDir));
+
+  I18N::reDetectLanguages();
+  QCOMPARE(spy.count(), 1);
+}
+
+QTEST_MAIN(I18NTests)
diff --git a/src/unittests/common/I18NTests.h b/src/unittests/common/I18NTests.h
new file mode 100644
index 000000000..56f86d1a1
--- /dev/null
+++ b/src/unittests/common/I18NTests.h
@@ -0,0 +1,31 @@
+/*
+ * Deskflow -- mouse and keyboard sharing utility
+ * SPDX-FileCopyrightText: (C) 2025 Chris Rizzitello <sithlord48@gmail.com>
+ * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
+ */
+
+#include <QTest>
+
+class I18NTests : public QObject
+{
+  Q_OBJECT
+private Q_SLOTS:
+  void initTestCase();
+  void creationTest();
+  void detectedLangTest();
+  void check639NameTest();
+  void toNativeNameTest();
+  void setLangTest();
+  void reDetectTest();
+
+private:
+  QString m_myTDir;
+  inline static const QString m_settingsPathTemp = QStringLiteral("tmp/test");
+  inline static const QString m_settingsFile = QStringLiteral("%1/Deskflow.conf").arg(m_settingsPathTemp);
+  inline static const QString m_stateFile = QStringLiteral("%1/Deskflow.state").arg(m_settingsPathTemp);
+  inline static const QMap<QString, QString> m_langMap = {
+      {QStringLiteral("English"), QStringLiteral("en")},  {QStringLiteral("Español"), QStringLiteral("es")},
+      {QStringLiteral("Italiano"), QStringLiteral("it")}, {QStringLiteral("日本語"), QStringLiteral("ja")},
+      {QStringLiteral("Русский"), QStringLiteral("ru")},  {QStringLiteral("简体中文"), QStringLiteral("zh_CN")}
+  };
+};