diff --git a/src/corelib/time/qtimezoneprivate.cpp b/src/corelib/time/qtimezoneprivate.cpp
index e3a12dc341a..13a24db870e 100644
--- a/src/corelib/time/qtimezoneprivate.cpp
+++ b/src/corelib/time/qtimezoneprivate.cpp
@@ -172,7 +172,7 @@ QString QTimeZonePrivate::displayName(qint64 atMSecsSinceEpoch,
 {
     const Data tran = data(atMSecsSinceEpoch);
     if (tran.atMSecsSinceEpoch != invalidMSecs()) {
-        if (nameType == QTimeZone::OffsetName && locale.language() == QLocale::C)
+        if (nameType == QTimeZone::OffsetName && isAnglicLocale(locale))
             return isoOffsetFormat(tran.offsetFromUtc);
         if (nameType == QTimeZone::ShortName && isDataLocale(locale))
             return tran.abbreviation;
@@ -194,7 +194,7 @@ QString QTimeZonePrivate::displayName(QTimeZone::TimeType timeType,
 {
     const Data tran = data(timeType);
     if (tran.atMSecsSinceEpoch != invalidMSecs()) {
-        if (nameType == QTimeZone::OffsetName && isDataLocale(locale))
+        if (nameType == QTimeZone::OffsetName && isAnglicLocale(locale))
             return isoOffsetFormat(tran.offsetFromUtc);
 
 #if QT_CONFIG(timezone_locale)
@@ -1041,8 +1041,8 @@ QTimeZonePrivate::Data QUtcTimeZonePrivate::data(QTimeZone::TimeType timeType) c
 
 bool QUtcTimeZonePrivate::isDataLocale(const QLocale &locale) const
 {
-    // Officially only supports C locale names; these are surely also viable for English.
-    return locale.language() == QLocale::C || locale.language() == QLocale::English;
+    // Officially only supports C locale names; these are surely also viable for en-Latn-*.
+    return isAnglicLocale(locale);
 }
 
 void QUtcTimeZonePrivate::init(const QByteArray &zoneId, int offsetSeconds, const QString &name,
diff --git a/src/corelib/time/qtimezoneprivate_p.h b/src/corelib/time/qtimezoneprivate_p.h
index b2c03e49f0a..67b4f724281 100644
--- a/src/corelib/time/qtimezoneprivate_p.h
+++ b/src/corelib/time/qtimezoneprivate_p.h
@@ -109,6 +109,13 @@ public:
     virtual Data data(qint64 forMSecsSinceEpoch) const;
     virtual Data data(QTimeZone::TimeType timeType) const;
     virtual bool isDataLocale(const QLocale &locale) const;
+    static bool isAnglicLocale(const QLocale &locale)
+    {
+        // Sufficiently like the C locale for displayName()-related purposes:
+        const QLocale::Language lang = locale.language();
+        return lang == QLocale::C
+            || (lang == QLocale::English && locale.script() == QLocale::LatinScript);
+    }
     QDateTimePrivate::ZoneState stateAtZoneTime(qint64 forLocalMSecs,
                                                 QDateTimePrivate::TransitionOptions resolve) const;
 
diff --git a/src/corelib/time/qtimezoneprivate_tz.cpp b/src/corelib/time/qtimezoneprivate_tz.cpp
index c9d4d551832..42246c3d084 100644
--- a/src/corelib/time/qtimezoneprivate_tz.cpp
+++ b/src/corelib/time/qtimezoneprivate_tz.cpp
@@ -1030,7 +1030,7 @@ QString QTzTimeZonePrivate::displayName(QTimeZone::TimeType timeType,
             if (nameType == QTimeZone::ShortName)
                 return tran.abbreviation;
             // Save base class repeating the data(timeType) query:
-            if (locale.language() == QLocale::C)
+            if (isAnglicLocale(locale))
                 return isoOffsetFormat(tran.offsetFromUtc);
         }
     }
@@ -1176,8 +1176,8 @@ QTimeZonePrivate::Data QTzTimeZonePrivate::data(QTimeZone::TimeType timeType) co
 
 bool QTzTimeZonePrivate::isDataLocale(const QLocale &locale) const
 {
-    // TZ data uses English / C locale names:
-    return locale.language() == QLocale::C || locale.language() == QLocale::English;
+    // TZ data uses en-Latn-* / C locale names:
+    return isAnglicLocale(locale);
 }
 
 bool QTzTimeZonePrivate::hasTransitions() const