Types to allow you to write your own functions. Note that if you are doing this yourself (instead of importing translations from a server), it'd be helpful if you make a PR or a comment on the repo so I can make the language available for others.
Is this a time in the past, or the future?
Should we include affix ("... ago", "in ...")?
Main function type : take all the above, return a string.
All available time intervals.