Lusitanic definitions of "Lusitanic" or "Lusitanian" may include medieval-to-modern Galicia, because the Portuguese people and Galician people share close linguistic and cultural ties, including pre-Roman Celtic ones. Modern Portuguese and the Galician language both derive from medieval Galician-Portuguese, and the term is a cultural classification more than a historic–geographical definition. Although, in Ancient Roman times, the Gallaeci were not part of Lusitania province, what became the Galician-Portuguese language developed from Vulgar Latin in Gallaecia, which comprised what is now Galicia, as well as north Portugal, the center of the development of post-Roman Portuguese culture. Later Portuguese use of the name "Lusitania"
RMS Lusitania "Olympic"-class liners were also more stable at sea and less prone to rolling. "Lusitania" and "Mauretania" both featured straight prows in contrast to the angled prows of the "Olympic" liners. Designed so that the ships could plunge through a wave rather than crest it, the unforeseen consequence was that the Cunard liners would pitch forward alarmingly, even in calm weather, allowing huge waves to splash the bow and forward part of the superstructure. The vessels of the "Olympic" class also differed from "Lusitania" and "Mauretania" in the way in which they were compartmented below the waterline. The White Star vessels