Why do the British call Malvina Islands Falkland Islands?

The name "Falkland Islands" was given to the islands by the English navigator John Strong in 1690, after the Falkland Sound, named in honour of Anthony Cary, 5th Viscount Falkland, First Lord of the Admiralty at the time. The Spanish name, "Islas Malvinas", comes from the French "Îles Malouines" (after Malo-les-Bains, a northern suburb of Saint-Malo), following the exploration of Louis Antoine de Bougainville in 1764.

The use of the different names is a matter of national identity and sovereignty. The British government refers to the islands as the "Falkland Islands" and the Argentine government refers to them as the "Islas Malvinas".