Auto-"correct" British spellings to their American equivalent.
To enable auto-"correction", run this command:
:Americanize
This creates abbreviations for common words whose spelling differs between British and American English, such as colour/color, behaviour/behavior, organise/organize, and so on. If you type 'colour', Vim will auto-correct it to 'color'. The abbreviations applied by the :Americanize command are local to the active buffer.
This plugin depends on Tim Pope's abolish plugin. If the :Abolish command isn't available, then the :Americanize command will do nothing.
Many of the abbreviations provided in this plugin were drawn from the Wikipedia article on the differences between British and American English.