Description of problem: the package "kde-i18n-Chinese-Big5" should be better named as "kde-l10n-zh_TW".
we should stay by KDE upstream name. Sorry. You could directly request the KDE upstream for changing the name.
KDE upstream has changed their names already: http://l10n.kde.org/download-translations.php
Than, according to l10n.kde.org names were changed; can't we update the package names for F7?
KDE upstream still release kde-i18n so we cannot change it for F7/F8. But it's done for next coming F9 https://bugzilla.redhat.com/show_bug.cgi?id=421231