Previously, the 'one' and 'other' subkeys were both required, with the 'zero' subkey being optionally used. This failed for some languages that do not have a 'one' form. All languages have an 'other' form, so make that the only subkey that's required, and turn 'one' into an optional subkey just like 'zero'.
Previously, the 'one' and 'other' subkeys were both required, with the 'zero' subkey being optionally used. This failed for some languages that do not have a 'one' form. All languages have an 'other' form, so make that the only subkey that's required, and turn 'one' into an optional subkey just like 'zero'.
Fixes #706