IANAL(inguist), just take it as my light hobby. Few days ago I started to wonder, if it would be possible, to make an universal alphabet suitable for all the languages of the planet Earth (and maybe for District 9 species too). Well. I think it could might be done, but I am not sure. So I am starting this topic here in Great Debates folder. I see a lot of problems, but I am sure most could be bypassed somehow.
As I see the whole thing, first, alphabet should be as strictly phonetic as possible. As in one sound - one character (letter). From my own experience I know it is easier to learn and communicate in languages with more strict phonetic rules (aside grammatic and other rules and peculiarities). Problem here as I see, such alphabet have more letters, sometimes drastically, as some languages use quite a lot more sounds than others. As far as I know, there are no completely phonetic alphabets on the world, some are more like this (Russian, Serbian, Czech, Greek), some are not (English, French), others are somewhere in between.
So to make it short, if we want that our international alphabet to have letters for all the used sounds in all the languages of the world, it would sure have at least 100 different letters. Impractical, at best.
Second problem, a lot (all?) languages use sounds with different length (short or long vowels, sometimes even consonants). Most alphabets use some kind of diacritics to distinguish length of a sound. Impractical, as we use that method to also distinguish intonation. So how should be that problem handled?
Third problem, some languages are tonal (Chinese), how to include that in this alphabet without further complicating that issue?
I am sure there are even more theoretical problems, not to mention practical problems - to learn all the population that alphabet, redesign computers, etc.
But for now, let’s just stay at theoretical level.