Pluralize a word: posts

Leave a plural alone: comments

Pluralize a word with a count less than 1: posts

Singularize a word with a count of 1: post

Pluralize a word with a count greater than 1: posts

Pluralize a word with a decimal count: posts

Singularize a plural with a count of 1: comment

Include the count with the word if desired: 3 posts