translation updates

apps/calendar/l10n/ca.php

apps/calendar/l10n/cs_CZ.php

apps/calendar/l10n/de.php

apps/calendar/l10n/el.php

apps/calendar/l10n/es.php

apps/calendar/l10n/et_EE.php

apps/calendar/l10n/gl.php

apps/calendar/l10n/sk_SK.php

apps/calendar/l10n/th_TH.php

apps/contacts/l10n/ar.php

apps/contacts/l10n/ca.php

apps/contacts/l10n/cs_CZ.php

apps/contacts/l10n/da.php

apps/contacts/l10n/de.php

apps/contacts/l10n/el.php

apps/contacts/l10n/eo.php

apps/contacts/l10n/es.php

apps/contacts/l10n/et_EE.php

apps/contacts/l10n/eu.php

apps/contacts/l10n/fr.php