i18n: Update Catalan and Spanish translations

Signed-off-by: Alexander Kojevnikov <alexander@kojevnikov.com>
i18n: Update Slovak translation

Signed-off-by: Alexander Kojevnikov <alexander@kojevnikov.com>
i18n: Update Italian translation

Signed-off-by: Alexander Kojevnikov <alexander@kojevnikov.com>
i18n: Sync with Transifex