Bugfixes / translations

...components/common/not-found/page-not-found.component.html

...p/components/common/not-found/page-not-found.component.ts

...app/components/dcc/dcc-contact/dcc-contact.component.html

src/app/components/dcc/dcc-contact/dcc-contact.component.ts

.../dcc-localised-string/dcc-localised-string.component.html

src/app/services/common/error/error.service.ts

src/app/services/dcc/initialization.service.ts

src/assets/i18n/de.json

src/assets/i18n/en.json

src/assets/i18n/es.json

src/assets/i18n/fr.json

src/assets/i18n/pt.json

translate.babel