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"
Sinking of the RMS Lusitania these; experts agreed they were not to blame for the second explosion. Allegations the ship was carrying more controversial cargo, such as fine aluminium powder, concealed as cheese on her cargo manifests, or guncotton (pyroxylene) disguised as casks of beef, have never been proven. In the 1960s, American diver John Light did several dives on the wreck, trying to prove the existence of contraband explosives in "Lusitania" 's cargo hold, ignited by the torpedo. Light claimed to have found a large hole on "Lusitania" 's port side, opposite of where the torpedo had struck, though later expeditions disproved his findings.