[tx-robot] updated from transifex

core/l10n/de.php

core/l10n/de_DE.php

core/l10n/es.php

core/l10n/gl.php

core/l10n/it.php

core/l10n/nl.php

core/l10n/pl.php

core/l10n/pt_BR.php

l10n/de/core.po

l10n/de_DE/core.po

l10n/es/core.po

l10n/gl/core.po

l10n/it/core.po

l10n/nl/core.po

l10n/pl/core.po

l10n/pt_BR/core.po

l10n/templates/core.pot

l10n/templates/files.pot

l10n/templates/files_encryption.pot

l10n/templates/files_external.pot