Talk:Suggestion/@comment-1820055-20150121132253/@comment-24980562-20150121195611

改 means "remodelled" (for the first time), 改二 means "remodelled a second time", etc.

German ships use "Zwei" & "Drei" instead of 改二 & 改三 respectively because lol German such an exotic language. The 改 is omitted because the devs probably thought it wasn't necessary, they know jack shit about German, and OMG GERMAN SO EXOTIC.

In the end it boils down to Japanese slapping a foreign language onto stuff without understanding it just because it sounds/looks cool.