Use string IDs for all currencies

src/localisation/string_ids.h

@@ -2166,6 +2166,9 @@ enum {
 	STR_MAX_PLAYERS = 5575,
 	STR_PORT = 5576,
 
+	STR_WON = 5577,
+	STR_ROUBLE = 5578,
+
 	// Have to include resource strings (from scenarios and objects) for the time being now that language is partially working
 	STR_COUNT = 32768
 };