Seventeen (8.x-1.4) - en to unknown language translation catalogue (7 entries)

en: Content
target: substanza

en: Help
target: sustegn(iment)

en: Never
target: mai

en: Header
target: lingia dal chau-pagina

en: Footer
target: pe-pagina

en: Close
target: serrar

en: Page bottom
target: pe-pagina
