Add Sindarin ⟨ae⟩, ⟨ai⟩, ⟨oe⟩, ⟨ui⟩ diphthongs

For ⟨ae⟩, we used to use the Latin [[aI]] phoneme, which sounds like
/ae/. Call that phoneme [[aE]] for us and introduce a separate [[aI]]
one, which sounds more like /ai/ (since Sindarin has both, and they’re
supposed to sound different, though Appendix E of The Lord of the Rings
notes that there is nothing closely corresponding to ⟨ae⟩ in English and
that it may be pronounced like ⟨ai⟩). Furthermore, for ⟨oe⟩, just remove
the TODO – the Latin phoneme is called [[OI]] but sounds more like /oe/
than /oi/, so it’s actually just fine for our purposes. Finally, the
⟨ui⟩ diphthong is copied from Finnish, just like in Quenya.

Makefile.am

@@ -420,6 +420,7 @@ phsource/phonemes.stamp: \
 	phsource/ph_serbian \
 	phsource/ph_setswana \
 	phsource/ph_shan \
+	phsource/ph_sindarin \
 	phsource/ph_sindhi \
 	phsource/ph_sinhala \
 	phsource/ph_slovak \

dictsource/sjn_rules

@@ -10,7 +10,7 @@
 
 .group a
 	a	a
-	ae (+	aI // TODO ae and ai should be different
+	ae (+	aE
 	ai (+	aI
 	au (+	aU
 	// light penultimate syllable: put stress on antepenultimate
@@ -97,7 +97,7 @@
 
 .group o
 	o	o
-	oe (+	OI // TODO oe and oi should be different
+	oe (+	OI
 	// light penultimate syllable: put stress on antepenultimate
 	o (AX	=o
 	o (CAX	=o
@@ -136,7 +136,7 @@
 
 .group u
 	u	u
-	// TODO ui (no suitable diphthong in ph_latin)
+	ui (+	ui
 	// light penultimate syllable: put stress on antepenultimate
 	u (AX	=u
 	u (CAX	=u

phsource/ph_sindarin

@@ -0,0 +1,18 @@
+phoneme aE
+  vwl starttype #a endtype #e
+  length 270
+  FMT(vdiph/ae)
+endphoneme
+
+phoneme aI
+  vwl starttype #a endtype #i
+  length 240
+  FMT(vdiph/ai)
+endphoneme
+
+phoneme ui
+  vwl starttype #u endtype #i
+  length 270
+  lng
+  FMT(vdiph/ui_4)
+endphoneme

phsource/phonemes

@@ -1924,6 +1924,7 @@ phonemetable qya la
 include ph_quenya
 
 phonemetable sjn la
+include ph_sindarin
 
 phonemetable es-la es
 include ph_spanish_la

tests/language-pronunciation.test

@@ -194,7 +194,7 @@ test_phon sd "s'Indhi b'o:li; 'Ind.o: jo:R'Vpi xa:nd'a:n s'a~: t[a:l'Vq R,@k#@nd
 J'Vnhn t['e: ,aRb'i: bo:l'i:;a J'o: b'I t[@m'a:m v'Vd.o: as'VR ,a:he:
 h'Ina v'aqt s'Indhi b'o:li s'Indh J'e: m'Vk# b'o:li_! 'ae~ d,@f@t['VRi z@b'a:n ,a:he:" "سنڌي ٻولي انڊو يورپي خاندان سان تعلق رکندڙ آريائي ٻولي آھي، جنھن تي عربي ٻوليءَ جو بہ تمام وڏو اثر آهي. هن وقت سنڌي ٻولي سنڌ جي مک ٻولي ۽ دفتري زبان آھي." "Arab"
 test_phon si "t'aw@t st#'a:n@ k'i:p@j,@kin w'a:rta: w'u: s'ul.u p'ipiri:m s'ah@ d'e:s@p,a:l@n@ p'akS@ k r'ija:k,a:ri:n 'at@r@ '&tiwu: g'&t.um h'e:tuwen 'ek 'ajeku m'ij@gos k'i:p@ d'eneku t'uwa:l@ l'aba: t'ibe:" "තවත් ස්ථාන කීපයකින් වාර්තා වූ සුළු පිපිරීම් සහ දේශපාලන පක්ෂ ක්‍රියාකාරීන් අතර ඇතිවූ ගැටුම් හේතුවෙන් එක් අයෙකු මියගොස් කීප දෙනෙකු තුවාල ලබා තිබේ." "Sinh"
-test_phon sjn "'alf 'aman 'amaRT 'amon 'aRag,oRn aRn'OIdi;,ad bel'eRi;,and b'oRom,iR bRag'ollax bR'eTil bRiT'ombaR k'aIR kaR'aDRas k,elebR'i:an kRiss'aIgRim d'eneT,oR dR'eNgist d'u::n ekT'eli;,on 'emyn eR'i;ad,oR f'ean,oR f'iNgon fiNg'olfin fin'aRfin f'oRox,el g'alaD,on gal'adRi;,el gR'ond gw'aIhiR j'aRwaIn j'oReT iT'ili;,en loTl'o:Ri;,en miT'eITel miTR'andiR moR'annon m'oRi;,a oR'offin osg'ili;,aT pal'anti:R p,alant'i:Ri pel'ennoR p,eRi;'annaT sil'ivRen ToR'ondoR" "alph Aman Amarth Amon Aragorn Arnoediad Beleriand Boromir Bragollach Brethil Brithombar Cair Caradhras Celebrían Crissaegrim Denethor Drengist dûn Ecthelion Emyn Eriador Fëanor Fingon Fingolfin Finarfin Forochel Galadhon Galadriel Grond Gwaihir Iarwain Ioreth Ithilien Lothlórien Mitheithel Mithrandir Morannon Moria Orophin Osgiliath Palantír Palantíri Pelennor Periannath Silivren Thorondor" "Sindarin"
+test_phon sjn "'alf 'aman 'amaRT 'amon 'aRag,oRn aRn'OIdi;,ad bel'eRi;,and b'oRom,iR bRag'ollax bR'eTil bRiT'ombaR bR'uinen k'aIR kaR'aDRas k,elebR'i:an kRiss'aEgRim d'eneT,oR dR'eNgist d'u::n ekT'eli;,on 'emyn eR'i;ad,oR f'ean,oR find'uilas f'iNgon fiNg'olfin fin'aRfin f'oRox,el g'alaD,on gal'adRi;,el gR'ond gw'aIhiR j'aRwaIn j'oReT iT'ili;,en loTl'o:Ri;,en miT'eITel miTR'andiR moR'annon m'oRi;,a oR'offin osg'ili;,aT pal'anti:R p,alant'i:Ri pel'ennoR p,eRi;'annaT sil'ivRen ToR'ondoR" "alph Aman Amarth Amon Aragorn Arnoediad Beleriand Boromir Bragollach Brethil Brithombar Bruinen Cair Caradhras Celebrían Crissaegrim Denethor Drengist dûn Ecthelion Emyn Eriador Fëanor Finduilas Fingon Fingolfin Finarfin Forochel Galadhon Galadriel Grond Gwaihir Iarwain Ioreth Ithilien Lothlórien Mitheithel Mithrandir Morannon Moria Orophin Osgiliath Palantír Palantíri Pelennor Periannath Silivren Thorondor" "Sindarin"
 test_phon sk "k'r:d;el^ St;'astni:Q d;'atl^ow 'utSi: pR'i;u:st;i: v'a:hu m'l:kveho k'on^a 'ophRi:zat; k'uoRu_:_: a ZR'at; tS'eRstve: m'eso
 p'et;ti:Zdn^,ove: v'l:tSata: n'eRvo:zn^e St;'ekaju: n'amu,ojho d;'atl^a_! v_ t'r:n^i:" "Kŕdeľ šťastných ďatľov učí pri ústí Váhu mĺkveho koňa obhrýzať kôru a žrať čerstvé mäso. Päťtýždňové vĺčatá nervózne štekajú na môjho ďatľa v tŕní." "Latn"
 test_phon sl "xiSn'i:tSin bR'a:tEts uzg'a:ja p'o:wZE p'o:t fik'u:sOm" "Hišničin bratec vzgaja polže pod fikusom." "Latn"