Does it matter how to spell these words?

[AllMakes]

I know English isn't the actual language of Islam, but is there a preferred (more respectable) way to spell certain words in English or does it not matter as long as they are pronounced correctly? Or does it even matter at all?

Koran, Quran, or Qur'an?
Kufir, Kafir, or Kufr?
Haram, or Haraam?
Osama or Usama?
Mohammed, Mohammet, or Muhammed?
Mujihadeen or Mujihadin?

etc etc....

[AbuMubarak]

Originally posted by AllMakes
I know English isn't the actual language of Islam, but is there a preferred (more respectable) way to spell certain words in English or does it not matter as long as they are pronounced correctly? Or does it even matter at all?

Koran, Quran, or Qur'an?
Kufir, Kafir, or Kufr?
Haram, or Haraam?
Osama or Usama?
Mohammed, Mohammet, or Muhammed?
Mujihadeen or Mujihadin?

etc etc....
quran is correct
kufr unbelief
kafir an unbeliever
haram or haraam same
usamah is correct
muhammad is correct
mujahideen plural
mujahid singular

[jamila]

Mohammd, Muhammad but not Muhammet or Mohammet
Haram=Sanctuary or {Haarem=Cloistered/in Refuge}
Haraam=legally forbidden (Sinful)
Quran, Qur'an, Quraan all acceptable
Koran is not