multilanguage improve and rispective merge of all language

interface/web/mail/lib/lang/bg_mail_alias.lng

interface/web/mail/lib/lang/bg_mail_blacklist.lng

interface/web/mail/lib/lang/bg_mail_content_filter.lng

interface/web/mail/lib/lang/bg_mail_domain.lng

interface/web/mail/lib/lang/bg_mail_domain_catchall.lng

interface/web/mail/lib/lang/bg_mail_forward.lng

interface/web/mail/lib/lang/bg_mail_get.lng

interface/web/mail/lib/lang/bg_mail_spamfilter.lng

interface/web/mail/lib/lang/bg_mail_transport.lng

interface/web/mail/lib/lang/bg_mail_user.lng

interface/web/mail/lib/lang/bg_mail_user_filter.lng

interface/web/mail/lib/lang/bg_mail_whitelist.lng

interface/web/mail/lib/lang/bg_spamfilter_blacklist.lng

interface/web/mail/lib/lang/bg_spamfilter_config.lng

interface/web/mail/lib/lang/bg_spamfilter_policy.lng

interface/web/mail/lib/lang/bg_spamfilter_users.lng

interface/web/mail/lib/lang/bg_spamfilter_whitelist.lng

interface/web/mail/lib/lang/de_mail_alias.lng

interface/web/mail/lib/lang/de_mail_blacklist.lng

interface/web/mail/lib/lang/de_mail_content_filter.lng