I18n: Update translation vi (99%).

680 translated messages, 1 untranslated message.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Add new translation ar (93%).

638 translated messages, 43 untranslated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation ar (100%).

681 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation zh_TW (100%).

681 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation uk (100%).

681 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation hr (82%).

562 translated messages, 119 untranslated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).