On Object notation, add DEFAULT option

[jorgeorejas]

Is your feature request related to a problem? Please describe.
I think would we awesome to still be able to use just the name of the object when we are writing our translations.

Describe the solution you'd like
In TailwindCSS they use the DEFAULT object to be the default behaviour.

Describe alternatives you've considered
I think the best option would be to use the DEFAULT as the way of doing it.

Additional context
This is what I was thinking of