List of Latin-script tetragraphs
This is a list of tetragraphs in the Latin script. These are most common in Irish orthography. For Cyrillic tetragraphs, see tetragraph.

Arrernte
Tetragraphs in Arrernte transcribe single consonants, but are largely predictable from their components.

 is 

 is 

  and  are 

 is

English
The majority of English tetragraphs make vowel sounds:   

 is pronounced , as in straight.

 is pronounced  in Received Pronunciation (RP), as in millionaire.

 is pronounced  in RP, as in bizarre.

 is pronounced  in RP, as in catarrh.

 is pronounced , as in caught.

 is pronounced  in RP, as in prayer.

 is pronounced  in RP, as in mayor.

 has three pronunciations;   as in weigh,  as in height, and  as in Leigh.

 has ten possible pronunciations, five of which make vowel sounds;  as in drought,  as in bought,  as in though,  as in through, and  as in thorough.
 is pronounced , as in queue.

 is pronounced  in RP, as in myrrh.

There are four examples of vowel tetragraphs that are found only in proper nouns:

 is pronounced  in RP, as found in Shakespeare.

 is pronounced  in RP, as found in Worcestershire.

 is pronounced  in RP, as found in Moore.

 is pronounced , as found in Hughes.

Three consonant tetragraphs exist in English that are more commonly sounded as two separate digraphs. However, when used in word-initial position they become one single sound:

 is pronounced  as in chthonian. Pronounced as two digraphs  in autochthonous.

 is pronounced  as in phthisis. Pronounced as two digraphs  (or  by some) in diphthong.

 is pronounced  as in shcherbakovite, a mineral named after Russian geochemist and mineralogist, . It is used as the transcription of the Cyrillic letter Щ and usually read as two separate digraphs,  as in pushchairs or  as in Pechishche, a place name in Belarus.

French
 is used to write the sound  in a few words such as myrtillier .

In addition, trigraphs are sometimes followed by silent letters, and these sequences may be confused with tetragraphs:

 is pronounced  in words such as "grecque" and "Mecque", where the trigraph cqu is followed by the feminine suffix e.

 is pronounced  when the silent plural suffix x is added to the trigraph eau.

German

 represents  in loanwords such as Dschungel ("jungle"), Aserbaidschan ("Azerbaijan"), Tadschikistan ("Tajikistan"), Kambodscha ("Cambodia") and Dschingis Khan ("Genghis Khan").

 represents , which is a relatively uncommon phoneme in German but appears in some very common words like deutsch ("German"), Deutschland ("Germany"), Tschechien ("Czech Republic"), and tschüss ("bye").

 is used for  in a few German names such as Zschopau and Zschorlau.

Hmong
There are several sequences of four letters in the Romanized Popular Alphabet that transcribe what may be single consonants, depending on the analysis.  However, their pronunciations are predictable from their components.  All begin with the  of prenasalization, and end with the  of aspiration.  Between these is a digraph, one of  ,  ,  , or  , which may itself be predictable.

 is .

 is .

 is .

 is .

Irish

Between two broad velarized consonants:

 and  represent  .
, ,  and  represent  ( in Donegal).
 represents .
 represents .
 represents .

Between two slender (palatalized) consonants:

 and  represent  ( in Donegal).

Between a broad and a slender consonant:

, ,  and  represent .

Between a slender and a broad consonant:

 represents  ( in Donegal).
 represents  ( in Donegal) and when unstressed word finally  ( in Mayo and Donegal).
 represents  and when unstressed word finally  in Mayo and Donegal.

Juǀʼhoan
The apostrophe was used with four trigraphs for click consonants in the 1987 orthography of Juǀʼhoan.  The apostrophe is considered a diacritic rather than a letter in Juǀʼhoan.

 for 

 for 

 for 

 for

Piedmontese
Piedmontese does not have tetragraphs.  A hyphen may separate  from  or , when these would otherwise be read as single sounds.

 and   , to avoid confusion with the digraph  for .

 and  are similarly used for the sequence .

Others

 and  are used in Dutch for the sounds  and , as in sneeuw, "snow" and nieuw, "new".  alone stands for , so these sequences are not predictable.

 is used in the practical orthography of the Taa language, where it represents the prevoiced affricate .

 is used for  in Swahili-based alphabets. However, the apostrophe is a diacritic in Swahili, not a letter, so this is not a true tetragraph.

 is used in Yanyuwa to write a pre-velar nasal, .

 is used in the Puter orthographic variety of the Romansh language (spoken in the Upper Engadin area in Switzerland) for the sequence  (while the similar trigraph  denotes the sounds  and ). It is not part of the orthography of Rumantsch Grischun, but is used in place names like S-chanf and in the Puter orthography used locally in schools again since 2011.

 is used in Xhosa to write the sound . It is often replaced with the ambiguous trigraph .

 is used in various Northern Athabaskan languages for , the dental ejective affricate.

References 

Latin-script tetragraphs