Eli Zaretskii writes: >> >> έ́́́́́́́́́́́́́́́́́́́́́́ > > Which problems do you see here? It's not possible to stack accents of the same type in Greek. There are many grammatical rules that are ignored in most input methods that I've checkout out, such as using specific accents in non vowels. There are specific rules that should be followed on which accents are used. Depending on the structure of the word & sentence, e.g a greek input method should not allow to have a "tonos (΄)" in a non-vowel. Also, some input methods have include sampi instead of "!" which is not really used in Greek since the 5th century BC (and even then it was not common). A greek-polytonic input method should follow the keybindings that are already used in greek polytonic keyboards & only allow certain accents depending on the character. A simple guide on polytonic can be found here[1] for anyone interested. [1] -- Thanos Apollo https://thanosapollo.org