yet another translation update

core/l10n/ca.php

core/l10n/de.php

core/l10n/es.php

core/l10n/fr.php

core/l10n/id.php

core/l10n/pl.php

core/l10n/ru.php

core/l10n/zh_CN.php

l10n/bg_BG/core.po

l10n/ca/core.po

l10n/cs_CZ/core.po

l10n/da/core.po

l10n/de/core.po

l10n/el/core.po

l10n/es/core.po

l10n/fr/core.po

l10n/id/core.po

l10n/it/core.po

l10n/lb/core.po

l10n/nb_NO/core.po