In theory, you could start distributing a modified character table, yeah. But in practice, that would make very little sense because you'd be relying on everyone using that same modified table or else see wrong or empty characters. Until 4.x brings Unicode support, it's best to just leave this to the two developers; you can pester them to add new characters themselves, but because there's so few free spots left in the table, there's no way they might add support for many more languages. Maybe a few, though!