diff --git a/src/framework/uicomponents/qml/Muse/UiComponents/tests/CMakeLists.txt b/src/framework/uicomponents/qml/Muse/UiComponents/tests/CMakeLists.txt
index 7fc0ce714c0f7..3995dd6207363 100644
--- a/src/framework/uicomponents/qml/Muse/UiComponents/tests/CMakeLists.txt
+++ b/src/framework/uicomponents/qml/Muse/UiComponents/tests/CMakeLists.txt
@@ -22,6 +22,7 @@ set(MODULE_TEST muse_uicomponents_qml_tests)
 
 set(MODULE_TEST_SRC
     ${CMAKE_CURRENT_LIST_DIR}/doubleinputvalidator_tests.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/intinputvalidator_tests.cpp
     )
 
 set(MODULE_TEST_LINK
diff --git a/src/framework/uicomponents/qml/Muse/UiComponents/tests/intinputvalidator_tests.cpp b/src/framework/uicomponents/qml/Muse/UiComponents/tests/intinputvalidator_tests.cpp
new file mode 100644
index 0000000000000..83ca41acd013f
--- /dev/null
+++ b/src/framework/uicomponents/qml/Muse/UiComponents/tests/intinputvalidator_tests.cpp
@@ -0,0 +1,168 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-only
+ * MuseScore-CLA-applies
+ *
+ * MuseScore
+ * Music Composition & Notation
+ *
+ * Copyright (C) 2026 MuseScore Limited and others
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <gtest/gtest.h>
+#include <qvalidator.h>
+
+#include "../validators/intinputvalidator.h"
+
+// Teach GoogleTest how to print QString so failure diffs are readable
+// instead of a UTF-16 byte dump.
+inline void PrintTo(const QString& s, std::ostream* os)
+{
+    *os << '"' << s.toStdString() << '"';
+}
+
+using namespace muse;
+using namespace muse::uicomponents;
+
+namespace muse::uicomponents {
+struct Input
+{
+    QString str;
+    QValidator::State expectedState;
+    QString fixedStr = {};
+};
+
+class IntInputValidatorTests : public ::testing::Test, public QObject
+{
+public:
+    void SetUp() override
+    {
+        m_validator = new IntInputValidator(nullptr);
+    }
+
+    void TearDown() override
+    {
+        delete m_validator;
+    }
+
+protected:
+    IntInputValidator* m_validator = nullptr;
+
+    void runInputTests(const std::vector<Input>& inputs)
+    {
+        int pos = 0;
+        for (const Input& input : inputs) {
+            QString inputCopy = input.str;
+            auto state = m_validator->validate(inputCopy, pos);
+            EXPECT_EQ(state, input.expectedState) << "validate(\"" << input.str.toStdString() << "\")";
+
+            if (QValidator::Invalid == input.expectedState) {
+                continue;
+            }
+
+            QString fixInput = input.str;
+            m_validator->fixup(fixInput);
+
+            QString expectedStr = input.fixedStr.isEmpty() ? input.str : input.fixedStr;
+            EXPECT_EQ(expectedStr, fixInput) << "fixup(\"" << input.str.toStdString() << "\")";
+        }
+    }
+};
+
+TEST_F(IntInputValidatorTests, ValidateCommaLocale) {
+    QLocale prev = QLocale();
+    QLocale::setDefault(QLocale("en_US"));
+
+    m_validator->setTop(48000);
+    m_validator->setBottom(-48000);
+
+    runInputTests({
+            { "0", QValidator::Acceptable },
+            { "1", QValidator::Acceptable },
+            { "100", QValidator::Acceptable },
+            { "1,000", QValidator::Acceptable },
+            { "1000", QValidator::Acceptable, "1,000" },
+            { "1,0000", QValidator::Acceptable, "10,000" },
+            { "48,000", QValidator::Acceptable },
+            { "48,001", QValidator::Invalid },
+            { "-100", QValidator::Acceptable },
+            { "-1,000", QValidator::Acceptable },
+            { "-1000", QValidator::Acceptable, "-1,000" },
+            { "-1,0000", QValidator::Acceptable, "-10,000" },
+            { "-48,000", QValidator::Acceptable },
+            { "-48,001", QValidator::Invalid },
+            { "2147483647", QValidator::Invalid },
+            { "-2147483648", QValidator::Invalid },
+            { "abc", QValidator::Invalid },
+            { "", QValidator::Intermediate, "0" }
+        });
+
+    m_validator->setTop(10);
+    m_validator->setBottom(1);
+
+    runInputTests({
+            { "0", QValidator::Invalid },
+            { "", QValidator::Intermediate, "1" },
+            { "1", QValidator::Acceptable }
+        });
+
+    m_validator->setTop(10);
+    m_validator->setBottom(5);
+
+    runInputTests({
+            { "1", QValidator::Intermediate, "5" },
+            { "2", QValidator::Intermediate, "5" }
+        });
+
+    m_validator->setTop(-50);
+    m_validator->setBottom(-100);
+
+    runInputTests({
+            { "-5", QValidator::Intermediate, "-50" },
+            { "-2", QValidator::Intermediate, "-50" },
+            { "-75", QValidator::Acceptable },
+            { "0", QValidator::Invalid }
+        });
+
+    QLocale::setDefault(prev);
+}
+
+TEST_F(IntInputValidatorTests, ValidateDotLocale) {
+    QLocale prev = QLocale();
+    QLocale::setDefault(QLocale("ro_RO"));
+
+    m_validator->setTop(48000);
+    m_validator->setBottom(-48000);
+
+    runInputTests({
+            { "0", QValidator::Acceptable },
+            { "1", QValidator::Acceptable },
+            { "100", QValidator::Acceptable },
+            { "1.000", QValidator::Acceptable },
+            { "1000", QValidator::Acceptable, "1.000" },
+            { "1.0000", QValidator::Acceptable, "10.000" },
+            { "48.000", QValidator::Acceptable },
+            { "48.001", QValidator::Invalid },
+            { "-100", QValidator::Acceptable },
+            { "-1.000", QValidator::Acceptable },
+            { "-1000", QValidator::Acceptable, "-1.000" },
+            { "-1.0000", QValidator::Acceptable, "-10.000" },
+            { "-48.000", QValidator::Acceptable },
+            { "-48.001", QValidator::Invalid },
+            { "abc", QValidator::Invalid },
+            { "", QValidator::Intermediate, "0" }
+        });
+
+    QLocale::setDefault(prev);
+}
+}
diff --git a/src/framework/uicomponents/qml/Muse/UiComponents/validators/intinputvalidator.cpp b/src/framework/uicomponents/qml/Muse/UiComponents/validators/intinputvalidator.cpp
index 4c5e52179aa2f..05c039514cb86 100644
--- a/src/framework/uicomponents/qml/Muse/UiComponents/validators/intinputvalidator.cpp
+++ b/src/framework/uicomponents/qml/Muse/UiComponents/validators/intinputvalidator.cpp
@@ -21,6 +21,7 @@
  */
 #include "intinputvalidator.h"
 #include "global/realfn.h"
+#include <qvalidator.h>
 
 using namespace muse::uicomponents;
 
@@ -31,44 +32,84 @@ IntInputValidator::IntInputValidator(QObject* parent)
 
 void IntInputValidator::fixup(QString& string) const
 {
+    QLocale locale;
+
     if (string.isEmpty() || string.endsWith("-")) {
         string.append("0");
     }
-    if (string.toInt() == 0) {
+
+    QString stripped = string;
+    stripped.remove(locale.groupSeparator());
+
+    bool ok = false;
+    int val = stripped.toInt(&ok);
+
+    if (!ok) {
         string = "0";
+        return;
     }
 
-    if (string.toInt() > m_top) {
-        string = QString::number(m_top);
-    } else if (string.toInt() < m_bottom) {
-        string = QString::number(m_bottom);
+    if (val > m_top) {
+        val = m_top;
+    } else if (val < m_bottom) {
+        val = m_bottom;
     }
+
+    string = locale.toString(val);
 }
 
 QValidator::State IntInputValidator::validate(QString& inputStr, int& cursorPos) const
 {
+    QLocale locale;
+    QString groupSep = locale.groupSeparator();
+
+    if (inputStr.contains(groupSep)) {
+        bool ok = false;
+        locale.toInt(inputStr, &ok);
+        if (!ok) {
+            // Handle group separator in the wrong place
+            int sepsBefore = inputStr.left(cursorPos).count(groupSep);
+            inputStr.remove(groupSep);
+            cursorPos -= sepsBefore;
+        }
+    }
+
+    QString digits = inputStr;
+    digits.remove(groupSep);
+
     QValidator::State state = Invalid;
 
     const int maxAbsoluteValue = std::max(std::abs(m_top), std::abs(m_bottom));
     const int maxNumberOfDigits = maxAbsoluteValue > 0
                                   ? std::floor(std::log10(maxAbsoluteValue)) + 1
                                   : 1;
-    if (inputStr.contains(QRegularExpression(QString("^\\-?\\d{1,%1}$").arg(maxNumberOfDigits)))) {
-        if ((maxNumberOfDigits >= 2 && inputStr.contains(QRegularExpression(QString("^\\-?0{2,%1}").arg(maxNumberOfDigits))))
-            || (inputStr.startsWith("-") && muse::RealIsNull(inputStr.toDouble()))) {
+    if (digits.contains(QRegularExpression(QString("^\\-?\\d{1,%1}$").arg(maxNumberOfDigits)))) {
+        if ((maxNumberOfDigits >= 2 && digits.contains(QRegularExpression(QString("^\\-?0{2,%1}").arg(maxNumberOfDigits))))
+            || (digits.startsWith("-") && muse::RealIsNull(digits.toDouble()))) {
             state = Intermediate;
         } else {
             state = Acceptable;
         }
-    } else if (inputStr.contains(QRegularExpression("^\\-?$"))) {
-        state = Intermediate;
-    } else {
+    } else if (digits.isEmpty()) {
+        return Intermediate;
+    } else if ((digits == "-")) {
+        if (m_bottom < 0) {
+            return Intermediate;
+        }
+
         cursorPos = 0;
         return Invalid;
     }
 
-    if (inputStr.toInt() > m_top || inputStr.toInt() < m_bottom) {
-        state = Intermediate;
+    int val = digits.toInt();
+    if (val > m_top) {
+        // A negative value above the maximum may still be an in-progress prefix
+        return val < 0 ? Intermediate : Invalid;
+    }
+
+    if (val < m_bottom) {
+        // Symmetrically, a positive not 0 value below the minimum may still be an in-progress
+        return val > 0 ? Intermediate : Invalid;
     }
 
     return state;