diff --git a/compose.go b/compose.go
index 6600c9b..eb7c9d4 100644
--- a/compose.go
+++ b/compose.go
@@ -100,7 +100,7 @@ func (s *Subject) CountString() string {
 	if s == nil {
 		return "1"
 	}
-	return core.Sprintf("%d", s.count)
+	return FormatNumber(int64(s.count))
 }
 func (s *Subject) GenderString() string {
 	if s == nil {
diff --git a/compose_test.go b/compose_test.go
index e4cd0e7..ce343c0 100644
--- a/compose_test.go
+++ b/compose_test.go
@@ -41,6 +41,21 @@ func TestSubject_Count_Good(t *testing.T) {
 	assert.True(t, subj.IsPlural())
 }
 
+func TestSubject_CountString_UsesLocaleFormatting(t *testing.T) {
+	svc, err := New()
+	require.NoError(t, err)
+	prev := Default()
+	SetDefault(svc)
+	t.Cleanup(func() {
+		SetDefault(prev)
+	})
+
+	require.NoError(t, SetLanguage("fr"))
+
+	subj := S("file", "test.txt").Count(1234)
+	assert.Equal(t, "1 234", subj.CountString())
+}
+
 func TestSubject_Count_Bad_NilReceiver(t *testing.T) {
 	var s *Subject
 	result := s.Count(5)
diff --git a/context.go b/context.go
index cdea823..a1ea227 100644
--- a/context.go
+++ b/context.go
@@ -1,7 +1,5 @@
 package i18n
 
-import "dappco.re/go/core"
-
 // TranslationContext provides disambiguation for translations.
 //
 //	T("direction.right", C("navigation")) // "rechts" (German)
@@ -137,7 +135,7 @@ func (c *TranslationContext) CountString() string {
 	if c == nil {
 		return "1"
 	}
-	return core.Sprintf("%d", c.count)
+	return FormatNumber(int64(c.count))
 }
 
 // IsPlural reports whether the count is plural.
diff --git a/context_test.go b/context_test.go
index 700a051..92651c1 100644
--- a/context_test.go
+++ b/context_test.go
@@ -101,6 +101,21 @@ func TestTranslationContext_WithFormality_Good(t *testing.T) {
 	}
 }
 
+func TestTranslationContext_CountString_UsesLocaleFormatting(t *testing.T) {
+	svc, err := New()
+	require.NoError(t, err)
+	prev := Default()
+	SetDefault(svc)
+	t.Cleanup(func() {
+		SetDefault(prev)
+	})
+
+	require.NoError(t, SetLanguage("fr"))
+
+	ctx := C("test").Count(1234)
+	assert.Equal(t, "1 234", ctx.CountString())
+}
+
 // --- Set / Get ---
 
 func TestTranslationContext_SetGet_Good(t *testing.T) {