Mark a gui label as translatable

https://bugzilla.gnome.org/show_bug.cgi?id=708246
Update Kazakh translation
Updated Spanish translation
Updated Galician translations
Updated Polish translation
Updated Belarusian translation.
Updated Basque language
Updated Hebrew translation
Punjabi Translation updated by Aman
Updated Brazilian Portuguese translation
Assamese translation updated
Dutch translation updated
Tajik translation updated
l10n: Update Japanese translation
[l10n] Added Italian translation.
Updated Hungarian translation
Punjabi Translation updated by Aman
Updated German translation
Updated slovak translation
Updated Traditional Chinese translation(Hong Kong and Taiwan)