Why not...I don't think it's a question of why anymore... but more of a when various people have the time and patience to upload 1(2+ in archives) GB's files and a compatible BGMain.exe patch series... with Miloch being rip apart in various other projects etc.
AKA, if you can make the .exe patch so that we can use the normal ANSI letters in the animation letters, you are more than welcome to remake the v5 beta of the install file, and thus fix this issue completely.
Sorry I've been too busy to check up on this until now but yeah, what Jarno said. Erephine in fact already changed the code to enable normal ANSI prefixes that we both agreed on. I just haven't had the time to update the patch, the tp2, the archives etc., and there will be a huge amount of work for EE compatibility, which will be totally different, and which we are in fact working on right now, so I'm waiting until there's a finalized schema for that before getting back to this. Yes, the current mod can pose a problem for non-European systems, but apart from that, it seems fairly stable, so I don't know if we want to introduce variants and more complexity to an already complex scheme if folks can just be patient a bit longer.