[sergbuto]

Unfortunately, I am not sure what is the source of your problem. When looking through the scope or UZO, SH3 uses the identification text from EnglishNames.cfg (say, the second part of line CLSouthampton=Southampton Light Cruiser). If the corresponding text is missing there, it is taken from ship's CFG file (say, second part of line
ClassName=CLSouthampton). This works for me in the stock version of the game. Are you using any of big mod-compilations, such GW, NYGM, etc?

Maybe the problem is connected with its spawning within a convoy as a generic ship (spawning by Unittype=6) and not labelled as an escort. This needs some investigation.

As to customs sounds, my understanding (as a result of taking a very brief look at this field, therefore maybe wrong here) ships sounds in stock SH3 are divided in a number of broad generic categories, such destroyer, cruiser, BB, etc. and are not really ship specific. I have not tried to mod this area yet, but will have to in order to fix electromotor sounds for submerged AI subs.