title_body: International Language
upvoted_answer: You seem to be confusing sounds with their representation in writing; similarly, countries and languages are not equivalent either.
  
  There is an inventory of sounds that are used in human languages; though most languages only use a small portion of it. If you are aiming for an international language, you should probably select those sounds that are common to most or all languages. I believe that toki pona comes close to that.
  
  Representing these sounds in writing is a completely different matter. Because different languages use the same letter to represent different sounds, your best bet might be to make up a completely new alphabet; then you don't have any pre-conceived notions of pronunciation to struggle with. On the flip side, everybody then has to learn the letters and how to pronounce them, which makes your language harder to learn.
  
  In your question you also touch on morphology: that is a whole different field, which you should probably put in a separate question.
  
  So, to summarise:
  
  
  each language has an inventory of sounds it uses, these are called phonemes.
  phonemes are represented in writing by letters; this is not a 1:1 mapping, and also
  depends on accents and dialectal variation.
  Letters can have diacritics (such as the dots on top of the &uuml;) &mdash; these usually make them separate letters from the base form.
  the letter-phoneme mapping is arbitrary; there is nothing inherent in the letter that determines how it should be pronounced.
  
  
  In general I would recommend that you read up on some of the concepts of linguistics, as that would make it easier for you to express what exactly you want to achieve.