Diacritics
Diacritics
[Cueball sitting in front of his lap top typing. The text above him is the one he is typing. The last word résumé has too many diacritics. The u has an umlaut (as in ü) and the last é has no less than six diacritics; a cedilla below (as in ȩ), a ring above (as in e̊ ), then three acute accents above the ring (as in é), and finally they are topped off by a breve (as in ĕ). In addition, find is spelled fīnd with a macron over the i . Also, the last full stop has three accents "´" above it:]
Cueball (typing): Attached please fīnd my résümȩ̊́́́̆.́́́
[Caption below the panel:] I usually leave out diacritics when I type, so I make up for it by occasionally adding a whole bunch at once.

A diacritic (or a diacritical mark) is a glyph added to a letter. The main use of diacritical marks in the latin script is to change the sound-values of the letters to which they are added, typically vowels .
Cueball is writing an e-mail (maybe for a job application) and notes in the mail that he attaches his résumé , or curriculum vitae . The word résumé uses two e s with an acute accent so they look like this: é.
While diacritics can be common in several languages, English is an example of a language that rarely ever has any at all. This occurs to such an extent that words and expressions borrowed from other languages (such as "résumé" or "piñata") are frequently written in English with the diacritics omitted, as in "resume" or "pinata". As Cueball/ Randall is a native English speaker, it is thus natural that he often forgets (or just doesn't bother) to add these diacritics, hence the title of the comic. When he occasionally remembers them, for instance when he types a word where he knows they should be included, like résumé, he then makes up for all those he must have forgotten since last time he thought of it, and thus adds a whole bunch at once. This reason is somewhat nonsensical.
Randall may be poking fun at people who use Zalgo , a form of spam where people continuously spam diacritics in chat messages. For example:



T̯̙̻̼̠͕̙̬̬̜̼̊ͥͦͬͤ̇̎̆̌ͭ͢͠͡o̡̲̩̟̲̬̰̪̜̝͙̺̦̙͍̳ͬͯͯ͋͒̍ͨ̓̇́̚̚̕ ̸̢̬̘̦͕̯̱̜̲̼̤ͬͧͤͨǐ̷̷̯̼̝̹̫ͪ̀̋̿̄̓n̿͂ͩ͂ͮ̔̆͏͎͍͕̜͎̺̯͈̼̩̣̥̬͡͞ͅͅv̴̨̙̼̤̼͙͖̫̖̺̹̠̹̦́͌͑̓̆̂ͯ̑̈̏ͭo̢̫̲̙̺̬̤̲̳ͨ̐ͦ̽͛ͮ͛́͂ͣ͂ͮ͆͑̍̀ͯ̕͟k̵̨̫̙̤͙̹̫͚͈̪͇͓͈̫̬̥͕̱͎̜̉̔ͬͭͦ̓͐ͫ̋̋ͥ̋̀̕͟è̢̛͑͋͐̀̏ͣ̏ͬ̒̌͌́̚͘͝͏̟̞͇̘̤̼̮̤͍͚̫̤͚̰ ̶̧̮̗̣̫͇̦͎̮̤̗͙̗̳͎̺͆̉̈ͭ̽̈́̌̽ͥ̾͑̀̚̚͘͟ͅͅt̸͓͉̩́̓̓ͮ̇̈̆ͣ̀ͪͬ͑̅ͣ̍h̸̡̧ͧ͑̐̂ͥ̄̃̂̄́͋ͨ͑̓̆͋̚͏̸̟̣̤̺͔̘̞̦̖͖̣̺̱̜͔̗̫̰ͅȇ̡͇͎͎̩̮̟̖̖̤̦̜͍̱̇ͨ̃̈́̄̑ͦͭ̚͞ͅ ̛̼̤̟̩̦̻̤̙̥̬̠̩̙̙̱͚͕ͫ͐̏ͥ̄ͧͧͭ̔̆͐̋͘h̶̵̜̤͓̹̰ͣ̄͗́́i̝͕̘̗͉͚̰͓̮͕̣͒̂̒ͨ̽ͫ̎ͪͦ́̕͝ͅv̧̙̞̣̳͍̟̖͚̻̝͈ͧ͊ͫ͋ͩͫ̍͋̏̽ͤ̀͝͞ͅẻ̢͓̣̰͔̟͎̥̻̤̲̟̣̜̄̈́̌͛̌̄͢͞ͅ-̨̡͆̓̌̎̉̑҉͚̝̗m̨̛͎̬͉̯̽ͥͫ̇ͦ̒̿̎́͒́̚͡͠ỉ̧̡͖͙̙͕͔̲ͩ́ͣ͐ͧ͑̊̾̒͑̅͗̊́̎̚n̠̮̜̝̜̤̰̻̘͖̦͚̼ͫ̄͐͗ͣ́͢͜d̡̛̳͕̬̫̯̩͕̰̖̟̲͕͙ͭ̅̓ͥ͛ͨ͒ͯ͌̚ͅͅ ̟̜̳̫͕̺͎̺̲̗̋̐̀͛͑̅̅͛̾̈́̀̚͞͠r̸̯̥͚̟̰͉͎͓̖͉͂̎̅̐ͫͧ͛ͯ͜ë́̎͂̆ͥͩ͟͏̰̤̳͓̩͉̲̣̠͍͔̗̦̬̱̯p̽ͧ͒͗ͣ̿̆̄̑͏̘̜̥̠̜̥̘̲̮̹̤̪̦͕͇͓͞r̴͓̼̺̰̹͙͉̦͚̞̤͕̭̦̈́ͫ̔̂̓̆̒͗͛̿̑̉̿̓ͤ̏̇̀̚͘͘͢é̴̢̛̖̗̖̤ͧ̽͑ͨ̒̌̍ͭ̑̋̃̒ͫ̀͡ş̶͉͚̠̠͇͓̬̙͚̖̝͓͕̤̟́̂̏ͧͩ͌͑͐ͣ͌͌̄̾̿ȩ̢͈̗̝͍ͨ̒͗ͭ̔̈͆ͫ̔ͨ̈́́̊ͣ̃̎̀͝͝n̸̟͔̺̠̺̓̑̏͐ͩͬ̏̈́̌͒́̏ͥ̌̍͊ͧ̀̚͜͞͞tͮ̾͒̇̐ͩ͆̓ͣ҉̢̤͖̩͕̬̮͚͙̖͕̬̘̙͘͠ͅĩ̡̬̙̙̯̩͋̋̄n̡̡̊̐͌ͣ̍̒̽ͩͫ͌ͦ̚͝͏̳̻̞͓̗̹̪̜̘̰̠̟͈̮̲̳̜g̵̎̓́̃ͮ̍̏̈̄ͧ̈́̐̔̏ͤͭͨ҉̛̘̰̘̟̬̝̰̜̗̼ͅͅ ̸̦̞͓̟͉̫͔̦̰̝͈̩̳̞̼̮̩̬͕̿ͩ͗̂̌̐ͭ͟͞c̳̻͚̻̩̻͉̯̄̏͑̋͆̎͐ͬ͑͌́͢h̵͔͈͍͇̪̯͇̞͖͇̜͉̪̪̤̙ͧͣ̓̐̓ͤ͋͒ͥ͑̆͒̓͋̑́͞ǎ̡̮̤̤̬͚̝͙̞͎̇ͧ͆͊ͅo̴̲̺͓̖͖͉̜̟̗̮̳͉̻͉̫̯̫̍̋̿̒͌̃̂͊̏̈̏̿ͧ́ͬ̌ͥ̇̓̀͢͜s̵̵̘̹̜̝̘̺̙̻̠̱͚̤͓͚̠͙̝͕͆̿̽ͥ̃͠͡.̔̈́ͤͣͪ̅̎̄̽ͩͪ͛̓̂̂̑͒҉̤͍͔̲̣̜͕̺͕͇̖͓̺̦̺́̀͢



Which reads (without the diacritics) as 'To invoke the hive mind representing chaos.'
The first diacritic is a macron over the i in "find". In English, this modifies a vowel to be "long". The second diacritic is the normal acute accent for the e in résumé, to make it an é which does belong in résumé . However, the third diacritic he uses is an umlaut on the u making it into ü, which is not part of the word. Ü typically represents the close front rounded vowel /y/, pronounced similar to the <ee> in "See" but with rounded lips. Ü can be found in languages such as German and Turkish ; however,  in French ü is not used in this way since the diacritic-less u already represents this sound. German has a word spelt as Resümee , but the meaning is not the same but rather conclusions or abstracts.
Cueball then goes all in on the last e which, like the first e, is supposed to have an acute accent. This e has a cedilla (as in ȩ), a ring (as in e̊), three acute accents, and is topped off by a breve (as in ĕ). In total, six  diacritics are used on this e alone.
Some languages—notably Vietnamese— can use more than one diacritic per letter , but usually only two (for example, ṏ). This is because in Vietnamese diacritics can serve two functions: the aforementioned modifying sound values as well as to indicate tone .  Using multiple diacritics in the comic's fashion makes little sense though it is reminiscent of (the aforementioned) Zalgo text .
There are also three acute accents over the last period. Diacritics over punctuation is not something that is ever used.
So for a word that is supposed to have two diacritics, Cueball uses eight, plus three for the period.
In the title text "not my forté" is supposed to mean that it is not one of Randall's strength or talent. However, to obtain this meaning forte should not have an acute diacritic over the e, thus proving Randall's point that it is not his forte to use diacritics. This is a form of hyperforeignism , where people spell loan words or use pronunciations that they believe is more faithful to the language it comes from instead of the "English" one, even though the "English" one is actually more correct. Due to its similarity with other words from French such as café, some people believe that forte is also spelled with a diacritic on the ending E (also note that the word was independently borrowed twice: from French as "a strength" and from Italian as a musical term. Neither usage requires diacritics).
The title text may be a reference to the what if? released a week before this comic, Fire from moonlight , in which note 9 reads, "My résumé says étendue is my forté" (with the same error on "forte"). It is possible that noticing his mistake was the inspiration for this comic. Also étendue can be written without the accent as etendue and the meaning is only written on this page in the Wiktionary. It means  property of the light in an optical system which makes sense in the context of the note. However, it means something different in French where it either refers to size or range as a noun or as a verb is the past participle of étendre meaning stretch or spread. The most correct way of writing the sentence he tried to write would only have involved the accent on résumé: "My résumé says etendue is my forte." Thus again making it clear that Randall has it right when he writes: "Using diacritics correctly is not my forté."
If there actually has been someone who corrected Randall's mistake in the what if?, then there could be an extra pun hidden in the title. Those who criticized Randall's use of accents, would thus become dia critics !
Comic 1209: Encoding also references an absurd use of diacritics, and later a possible movie called Combining Diacritical Marks was mentioned in 1857: Emoji Movie , a direct reference to this comic.
[Cueball sitting in front of his lap top typing. The text above him is the one he is typing. The last word résumé has too many diacritics. The u has an umlaut (as in ü) and the last é has no less than six diacritics; a cedilla below (as in ȩ), a ring above (as in e̊ ), then three acute accents above the ring (as in é), and finally they are topped off by a breve (as in ĕ). In addition, find is spelled fīnd with a macron over the i . Also, the last full stop has three accents "´" above it:]
Cueball (typing): Attached please fīnd my résümȩ̊́́́̆.́́́
[Caption below the panel:] I usually leave out diacritics when I type, so I make up for it by occasionally adding a whole bunch at once.
