There is no standard variety of Scottish Gaelic; although statements below are about all or most dialects, the north-western dialects (Outer Hebrides, Skye and the Northwest Highlands) are discussed more than others as they represent the majority of speakers.

Gaelic phonology is characterised by:

• a phoneme inventory particularly rich in sonorant coronal phonemes (commonly nine in total)
• a contrasting set of palatalised and non-palatalised consonants
• strong initial word-stress and vowel reduction in unstressed syllables
• The presence of preaspiration of stops in certain contexts
• falling intonation in most types of sentences, including questions
• lenition and extreme sandhi phenomena

Due to the geographic concentration of Gaelic speakers along the western seaboard with its numerous islands, Gaelic dialectologists tend to ascribe each island its own dialect. On the mainland, no clear dialect boundaries have been established to date but the main areas are generally assumed to be Argyllshire, Perthshire, Moidart/Ardnamurchan, Wester Ross and Sutherland.

History of the discipline

Descriptions of the language have largely focused on the phonology. Welsh naturalist Edward Lhuyd published the earliest major work on Scottish Gaelic after collecting data in the Scottish Highlands between 1699 and 1700, in particular data on Argyll Gaelic and the now obsolete dialects of north-east Inverness-shire.^[1]

Following a significant gap, the middle to the end of the twentieth century saw a great flurry of dialect studies in particular by Scandinavian scholars, again focussing largely on phonology:

• 1938 Nils Holmer Studies on Argyllshire Gaelic published by the University of Uppsala
• 1937 Carl Borgstrøm The Dialect of Barra published by Norsk Tidsskrift for Sprogvidenskap
• 1940 Carl Borgstrøm The Dialects of the Outer Hebrides published by Norsk Tidsskrift for Sprogvidenskap
• 1941 Carl Borgstrøm The Dialects of Skye and Ross-shire published by the Norwegian University Press
• 1956 Magne Oftedal The Gaelic of Leurbost, Isle of Lewis published by Norsk Tidsskrift for Sprogvidenskap
• 1957 Nils Holmer The Gaelic of Kintyre published by the Dublin Institute for Advanced Studies
• 1962 Nils Holmer The Gaelic of Arran published by the Dublin Institute for Advanced Studies
• 1966 Gordon MacGillFhinnein Gàidhlig Uibhist a Deas ("South Uist Gaelic") published by the Dublin Institute for Advanced Studies
• 1973 Elmar Ternes The Phonemic Analysis of Scottish Gaelic (focussing on Applecross Gaelic) published by the Helmut Buske Verlag
• 1978 Nancy Dorian East Sutherland Gaelic published by the Dublin Institute for Advanced Studies
• 1989 Máirtín Ó Murchú East Perthshire Gaelic published by the Dublin Institute for Advanced Studies

In the period between 1950 and 1963, fieldwork was carried out to document all then remaining Gaelic dialects, culminating in the publication of the five-volume Survey of the Gaelic Dialects of Scotland by the Dublin Institute for Advanced Studies in 1997. The survey collected data from informants as far south as Arran, Cowal, Brig o' Turk, east to Blairgowrie, Braemar and Grantown-on-Spey, north-east to Dunbeath and Portskerra and all areas west of these areas, including St Kilda.

Vowels

The following is a chart of the monophthong vowel phonemes appearing in Scottish Gaelic:^[2]

All vowel phonemes except for /ɪ/ and /ə/ can be both long (represented with ⟨ː⟩) and short. Phonologically, /a/ behaves both as a front or back vowel depending on the geographical area and vowel length.

Diphthongs

The number of diphthongs in Scottish Gaelic depends to some extent on the dialect in question but most commonly, 9 or 10 are described: /ei, ɤi, ai, ui, iə, uə, ɛu, ɔu, au, ia/.^[4]

Orthography

Stressed vowels are written as follows:

A table of vowels with pronunciations in the IPA

Spelling	Pronunciation	Scottish English equivalents	As in
a, á	,	cat	bata, ás
à, a		father/calm	bàta, barr
e	,	get	le, teth
è, é	,	wary, late/lady	gnè, dé
i	,	tin, sweet	sin, ith
ì, i		evil, machine	mìn, binn
o	,	top	poca, bog
ò, o, ó	,	jaw, boat/go	pòcaid, corr, mór
u		brute	Tur
ù, u		brewed	tùr, cum

The English equivalents given are approximate, and refer most closely to the Scottish pronunciation of Standard English. The vowel in English father is back in Southern English. The ⟨a⟩ in English late in Scottish English is the pure vowel eː rather than the more general diphthong eɪ. The same is true for the ⟨o⟩ in English boat, oː in Scottish English, instead of the diphthong əʊ.

Digraphs and trigraphsedit

The language uses many vowel combinations, which can be categorised into two types, depending on the status of one or more of the written vowels in the combinations.

Category 1: vowel plus glide vowels. In this category, vowels in digraphs/trigraphs that are next to a neighbouring consonant are for all intents and purposes part of the consonant, showing the broad or slender status of the consonant.

Spelling	Pronunciation	Preceding consonant	Following consonant	As in
ai	a~ɛ; (unstressed syllables) ɛ~ə~i	preceded by a broad consonant or Ø	followed by a slender consonant	(stressed syllable) caileag, ainm ɛnɛm; (unstressed syllables) iuchair, geamair, dùthaich
ài	aː	preceded by a broad consonant or Ø	followed by a slender consonant	àite, bara-làimhe
ea	ʲa~e~ɛ in part dialect variation	preceded by a slender consonant or Ø	followed by a broad consonant	geal; deas; bean
eà	ʲaː	preceded by a slender consonant or Ø	followed by a broad consonant	ceàrr
èa	ɛː	preceded by a slender consonant or Ø	followed by a broad m, mh or p	nèamh
èa	ia	preceded by a slender consonant or Ø	followed by a broad consonant other than m, mh or p	dèan
ei	e~ɛ	preceded by a slender consonant or Ø	followed by a slender consonant	eile; ainmeil
èi	ɛː	preceded by a slender consonant or Ø	followed by a slender consonant	sèimh
éi	eː	preceded by a slender consonant or Ø	followed by a slender consonant	fhéin
eo	ʲɔ	preceded by a slender consonant or Ø	followed by a broad consonant	deoch
eò	ʲɔː	preceded by a slender consonant or Ø	followed by a broad consonant	ceòl
eòi	ʲɔː	preceded by a slender consonant or Ø	followed by a slender consonant	feòil
eu	eː~ia dialect variation, broadly speaking south versus north; (in most cases preceding labial consonants and in litery terms e.g. literary treun t̪ʰɾeːn (làidir being the more common term for 'strong') eː	preceded by a slender consonant or Ø	followed by a broad consonant	(preceding labial consonants) ceum, reubair
io	i, (j)ũ(ː)	preceded by a slender consonant or Ø	followed by a broad consonant	fios, fionn
ìo	iː, iə	preceded by a slender consonant or Ø	followed by a broad consonant	sgrìobh, mìos
iu	(j)u	preceded by a slender consonant or Ø	followed by a broad consonant	piuthar, fliuch
iù	(j)uː	preceded by a slender consonant or Ø	followed by a broad consonant	diùlt
iùi	(j)uː	preceded by a slender consonant or Ø	followed by a slender consonant	diùid
oi	ɔ, ɤ	preceded by a broad consonant or Ø	followed by a slender consonant	boireannach, goirid
òi	ɔː	preceded by a broad consonant or Ø	followed by a slender consonant	òinseach
ói	oː	preceded by a broad consonant or Ø	followed by a slender consonant	cóig
ui	u, ɯi, uːi; (unstressed syllables) ə/ɨ	preceded by a broad consonant or Ø	followed by a slender consonant	muir, uighean, tuinn
ùi	uː	preceded by a broad consonant or Ø	followed by a slender consonant	dùin

Category 2: 'diphthongs' and 'triphthongs'. In this category, vowels are written together to represent either a diphthong, or what was in Middle Irish a diphthong.

Spelling	Pronunciation	Preceding consonant	Following consonant	As in
ao	ɯː	preceded by a broad consonant or Ø	followed by a broad consonant	caol
ia	iə, ia	preceded by a slender consonant or Ø	followed by a broad consonant	biadh, dian
ua	uə	preceded by a broad consonant or Ø	followed by a broad consonant	ruadh, uabhasach

Category 2 digraphs can by followed by Category 1 glides, and thereby form trigraphs:

Spelling	Pronunciation	Preceding consonant	Following consonant	As in
aoi	ɯː~ɤ	preceded by a broad consonant or Ø	followed by a slender consonant	caoil; gaoithe
iai	iə, ia	preceded by a slender consonant or Ø	followed by a slender consonant	Iain
uai	uə	preceded by a broad consonant or Ø	followed by a slender consonant	ruaidh, duais

Consonantsedit

Like the closely related languages Modern Irish and Manx, Scottish Gaelic contains what are traditionally referred to as "broad" and "slender" consonants. Historically, Primitive Irish consonants preceding the front vowels /e/ and /i/ developed a j-like coarticulation similar to the palatalized consonants found in Russian^[5][6] while the consonants preceding the non-front vowels /a/, /o/ and /u/ developed a velar coarticulation. While Irish distinguishes "broad" (i.e. phonetically velar or velarised consonants) and "slender" (i.e. phonetically palatal or palatalised consonants), in Scottish Gaelic velarisation is only present for /n̪ˠ l̪ˠ rˠ/. This means that consonants marked "broad" by the orthography are, for the most part, simply unmarked, while "slender" consonants are palatal or palatalised. In the modern languages, there is sometimes a stronger contrast from Old Gaelic in the assumed meaning of "broad" and "slender"; the phonetic distinction can be more complex than mere "velarisation"/"palatalisation". For instance, the Gaelic "slender s" is so palatalised that it has become postalveolar ʃ. The main exception to this contrast are the labials (/p pʰ m f v/), which have lost their palatalised forms. The only trace of their original palatalisation is a glide found before a back vowel, e.g. beum /peːm/ ('stroke') vs beò /pjɔː/ ('alive'). Celtic linguists traditionally transcribe slender consonants with an apostrophe (or more accurately, a prime) following the consonant (e.g. ⟨m′⟩) and leave broad consonants unmarked.

Consonants of Scottish Gaelic

		Labial	Coronal			Dorsal		Glottal
			Dental	Alveolar	Palatal		Velar
Plosive		p   pʰ	t̪   t̪ʰ		tʲ   tʲʰ	kʲ   kʲʰ	k   kʰ
Fricative		f   v	s̪		ʃ	ç   ʝ[a]	x   ɣ	h
Nasal		m	n̪ˠ	n	ɲ
Approximant			l̪ˠ	l	ʎ	j[a]
Rhotic	Tap			ɾ ɾʲ
	Trill			rˠ

The unaspirated stops in some dialects (east and south) are voiced (see below), as in Manx and Irish. In the Gaelic of Sutherland and the MacKay Country, this is the case, while in all other areas full voicing is allophonic with regional variation. Voicing additionally occurs in certain environments, such as within breath groups and following homorganic nasals (see below).^{[citation needed]} The variation suggests that the unaspirated stops at the underlying phonological level are voiced, with devoicing an allophonic variant that in some dialects has become the most common realisation. East Perthshire Gaelic reportedly lacks either a voicing or an aspiration distinction and has merged these stops. Irish dialects and Manx also have devoiced unaspirated consonants in certain environments.

Certain consonants (in particular the fricatives h x ç ɣ ʝ v and the lenis coronals l n ɾ ɾʲ) are rare in initial position except as a result of lenition.

Phonetic variationedit

Gaelic phonemes may have various allophones as well as dialectal or variations in pronunciation not shown in the chart above. The more common ones are: Zdroj:https://en.wikipedia.org?pojem=Scottish_Gaelic_phonology_and_orthography
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