Where modern English-language ship classifications come from

Why do English-language discussions use their present terminology for ship types?

The terms reflect treaty and NATO definitions plus a broadly Anglophone, often British-influenced vocabulary, not an exclusively American system.

Current English-language ship type names are not purely American. Naval treaties supplied important common definitions, while NATO later imposed enough alignment to force changes in United States terminology. American frigates and destroyer leaders show how national labels once diverged from allied usage. The channel uses a broadly agreed Anglophone system whose vocabulary has a British cast.