QFontInfo::family() does not show localized family name on OS X with Japanese locale.

Steps to reproduce this issue.

1. Make a sample application which has a QFontComboBox widget.
2. Set OS language to Japanese, so that all font names in the combo box will be localized in Japanese.
3. Select a font called "ヒラギノ角ゴ Pro" in the combo box and save selected family name into a QString variable.
4. We tried to get the font family name back from above step's QString variable by using: QFontInfo("ヒラギノ角ゴ Pro").family() method.

Expected result: returned value of family() method will be localized in Japanese.
Actual result: "Hiragino Kaku Gothic Pro" which is the original family name in English.

We used the result of QFontInfo::family() to find the correct font name in combo box. The combo box contains font names in Japanese while QFontInfo::family() returns font name in English so the combo box doesn't find anything match with the keyword.

Alternative test code listed below.

diff --git a/examples/dialogs/standarddialogs/dialog.cpp b/examples/dialogs/standa
index bdfc739..ff640ae 100644
--- a/examples/dialogs/standarddialogs/dialog.cpp
+++ b/examples/dialogs/standarddialogs/dialog.cpp
@@ -272,6 +272,8 @@ void Dialog::setFont()
         fontLabel->setText(font.key());
         fontLabel->setFont(font);
     }
+    qDebug() << "font.family():" << font.family();
+    qDebug() << "QFontInfo(font.family()).family():" << QFontInfo(font.family()).
 }

 void Dialog::setExistingDirectory()

Qt 4.8.4/5

font.family(): "ヒラギノ角ゴ Pro"
QFontInfo(font.family()).family(): "Hiragino Kaku Gothic Pro"
*Expected: QFontInfo(font.family()).family(): "ヒラギノ角ゴ Pro"

Qt 5.1

font.family(): "ヒラギノ角ゴ Pro"
QFontInfo(font.family()).family(): "ヒラギノ角ゴ Pro"