In my multideck I mitigated this by using emojis as suits, so you can write notes on your phone. For the Everdeck you can use: ♣♠♥♦ coin, crown, moon, star (hacker news doesn't support emojis)
The number of "proto-emoji" that HN does not block is interesting given HN's preference to block emoji, but also illustrates some of the fun compatibility complexity of Unicode.