Motivation / Problem

In American English, the word for "maize" is "corn" (see https://en.wikipedia.org/wiki/Maize). As an American, when I first played a game in a tropical climate, I didn't know the word "maize" so I had to look it up just to find out that it's the same thing as what Americans call "corn".

Also in American English the preferred spelling is "liter" not "litre". This is much more minor, but I might as well fix it as well.

Description

I simply changed the British words/spellings to their American equivalent.

Limitations

Obviously it will now be in American English instead of British English, but this is only for the American English translation. People who want the game in British English should be using the British English translation which won't be affected by this.

Checklist for review

Some things are not automated, and forgotten often. This list is a reminder for the reviewers.

• The bug fix is important enough to be backported? (label: 'backport requested')
• This PR affects the save game format? (label 'savegame upgrade')
• This PR affects the GS/AI API? (label 'needs review: Script API')
  • ai_changelog.hpp, gs_changelog.hpp need updating.
  • The compatibility wrappers (compat_*.nut) need updating.
• This PR affects the NewGRF API? (label 'needs review: NewGRF')
  • newgrf_debug_data.h may need updating.
  • PR must be added to API tracker