- Yes
 - No
 
Naval Prefixes are used to identify what country a ship comes from. Currently, in game, only ~4 countries have a majority of their ships with naval prefixes.
Those are;
USA

With the prefix USS (United States Ship)
UK




With the prefix HMS (His/Her Majesty’s Ship), and an added note for HMAS, HMNZS, and HMCS, (His/Her Majesty’s Australian, New Zealand, and Canadian Ship, respectively)
Japan


With the prefix IJN (Imperial Japanese Navy) or JDS (Japanese Defense Ship)
Italy

With the prefix RN (Regia Nave)
Germany gets an honorable mention for the Kaiserliche Marine ships in game

With the prefix SMS (Seiner Majestät Schiff)
As for the missing ones, those are Germany (the rest of it), the USSR, France, and a few Italian ships.
Regarding prefixes for these navies, these are the ones I suggest
Germany



KMS (Kriegsmarine Ship), VMS (Volksmarine Ship), and FGS (Federal German Ship)
USSR


USSRS (Union of Soviet Socialist Republic Ship) and HIRMS (His/Her Imperial Russian Majesty’s Ship)
France




FTR (French Third Republic), FFNF (Free French Naval Forces), VFNF (Vichy French Naval Forces), and FS (French Ship - post-war ships)
Italy

ITS (Italian Ship)
These prefixes would add a bit more life and flavor to each tree, and I think it would allow for easier identification by name alone. If displayed somewhere in the battle, be it in the name of the ship that pops up in the killfeed or elsewhere, it would give players an idea of what ship they may be fighting against at any given time, in case they forgot, or are unaware, where the particular name came from.
References
wikipedia - Ship Prefixes
wikipedia - Classes of French Ships for distinguishing the French Third Republic, Vichy, and Free French ships