doc questions

[Edward Sanford Sutton, III]

  Should the manual match 'UK' or 'USA' style?
  Under 'Metronome marks', should '\tempo duration = perminute' have 
'perminute' with a capital 'm' (or another syntax used) to indicate that it 
is 2 words used to describe that paramater.
  Should 'Single stem tremolos are _StemTremolo_s.' phrase be rewritten as 
'Single stem tremolos are _StemTremolo_ objects.' ?
  Is there a preference to using decrescendo versus diminuendo?
  Should 'Ped' be 'Ped.'?
  Is 'autochanger' or 'auto changer' preferred/more correct? Discussion of my 
previous 'autobeamer=auto beamer' change was brought up. I'm pretty sure 
hyphenated is incorrect with auto, which leaves 2 choices if that is right.
  'noteheads' or 'note heads' preferred?
**  Should 'prepending' be replaced with 'prefixing'?
  Should 'augmentum' dots within ligatures be 'augmentation' dots within 
ligatures?
  Should 'multiphony' be 'polyphony'? Could this apply for 'multivoice'?
  Shouldn't 'backend' be hyphenated?
  'piu' should have an accent over the 'u'; Do we try to avoid certain 
characters in the docs?