Unicode has things for this: https://en.wikipedia.org/wiki/Zero-width_non-joiner https://en.wikipedia.org/wiki/Zero-width_non-joiner And customization is done

Unicode has things for this: https://en.wikipedia.org/wiki/Zero-width_non-joiner https://en.wikipedia.org/wiki/Zero-width_non-joiner And customization is done declaratively, not imperatively.