The obvious parallel are modifiers in other language. For example, umlauts in German can be considered as the regular letters A, O and U with diacritics[0]. In

The obvious parallel are modifiers in other language. For example, umlauts in German can be considered as the regular letters A, O and U with diacritics[0]. In the same way, if the Turkish dotless upper case I was encoded as a separate letter from Capital Latin Letter I, Turkish ı could receive a "dot above" modifier to become i and Turkish I could receive the same modifier to become İ. [0]: I'm German, so I'm aware that it's a bit more complex than that, but although we have separate "letters" for Ä, Ö and Ü, they're really just AE, OE and UE ligatures, respectively. You could argue that they're not because replacing them with the non-ligature version changes meaning but thanks to modern technology (and historical domain name restrictions) most Germans can deal with that kind of ambiguity just fine. Besides, the diaeresis in German umlauts is actually a vestigial lower case "e" (as can be seen in old manuscripts).