should be an object of the replacement strings for moment#from.

If a locale requires additional processing for a token, it can set the token as a function with the following signature.The function should return a string.

The number argument refers to the number of units for that key. For m, the number is the number of minutes, etc.

The isFuture argument will be true if it is going to use the future suffix/prefix and false if it is going to use the past prefix/suffix.