I don&#x27;t think the sounds matter as much as the sound patterns. You can certainly make up diacritics and letters that fit the visual style of Arabic or Latin script to make up for missing sounds in a particular language. I assume (I could be wrong though) that Arabic and Hebrew writing and vowel patterns are such that a native speaker, and literate, can read well without that vowel diacritics since most words are based on tri-consonant roots (though I understand modern Hebrew has a lot of borrowed words from non-Semitic languages). In languages without consonant roots, if you remove the vowels, it seems to create a lot more ambiguity. I wonder if there are any studies on that?