import script and language names from Context

1 files changed, 662 insertions, 5 deletions

diff --git a/luaotfload-features.lua b/luaotfload-features.lua
index 220b362..e732ed9 100644
--- a/luaotfload-features.lua
+++ b/luaotfload-features.lua
@@ -93,6 +93,640 @@ defaults.tibt = defaults.khmr
 
 defaults.lao  = defaults.thai
 
+---[[ begin excerpt from font-ott.lua ]]
+
+local scripts = {
+    ['arab'] = 'arabic',
+    ['armn'] = 'armenian',
+    ['bali'] = 'balinese',
+    ['beng'] = 'bengali',
+    ['bopo'] = 'bopomofo',
+    ['brai'] = 'braille',
+    ['bugi'] = 'buginese',
+    ['buhd'] = 'buhid',
+    ['byzm'] = 'byzantine music',
+    ['cans'] = 'canadian syllabics',
+    ['cher'] = 'cherokee',
+    ['copt'] = 'coptic',
+    ['cprt'] = 'cypriot syllabary',
+    ['cyrl'] = 'cyrillic',
+    ['deva'] = 'devanagari',
+    ['dsrt'] = 'deseret',
+    ['ethi'] = 'ethiopic',
+    ['geor'] = 'georgian',
+    ['glag'] = 'glagolitic',
+    ['goth'] = 'gothic',
+    ['grek'] = 'greek',
+    ['gujr'] = 'gujarati',
+    ['guru'] = 'gurmukhi',
+    ['hang'] = 'hangul',
+    ['hani'] = 'cjk ideographic',
+    ['hano'] = 'hanunoo',
+    ['hebr'] = 'hebrew',
+    ['ital'] = 'old italic',
+    ['jamo'] = 'hangul jamo',
+    ['java'] = 'javanese',
+    ['kana'] = 'hiragana and katakana',
+    ['khar'] = 'kharosthi',
+    ['khmr'] = 'khmer',
+    ['knda'] = 'kannada',
+    ['lao' ] = 'lao',
+    ['latn'] = 'latin',
+    ['limb'] = 'limbu',
+    ['linb'] = 'linear b',
+    ['math'] = 'mathematical alphanumeric symbols',
+    ['mlym'] = 'malayalam',
+    ['mong'] = 'mongolian',
+    ['musc'] = 'musical symbols',
+    ['mymr'] = 'myanmar',
+    ['nko' ] = "n'ko",
+    ['ogam'] = 'ogham',
+    ['orya'] = 'oriya',
+    ['osma'] = 'osmanya',
+    ['phag'] = 'phags-pa',
+    ['phnx'] = 'phoenician',
+    ['runr'] = 'runic',
+    ['shaw'] = 'shavian',
+    ['sinh'] = 'sinhala',
+    ['sylo'] = 'syloti nagri',
+    ['syrc'] = 'syriac',
+    ['tagb'] = 'tagbanwa',
+    ['tale'] = 'tai le',
+    ['talu'] = 'tai lu',
+    ['taml'] = 'tamil',
+    ['telu'] = 'telugu',
+    ['tfng'] = 'tifinagh',
+    ['tglg'] = 'tagalog',
+    ['thaa'] = 'thaana',
+    ['thai'] = 'thai',
+    ['tibt'] = 'tibetan',
+    ['ugar'] = 'ugaritic cuneiform',
+    ['xpeo'] = 'old persian cuneiform',
+    ['xsux'] = 'sumero-akkadian cuneiform',
+    ['yi'  ] = 'yi',
+}
+
+local languages = {
+    ['aba'] = 'abaza',
+    ['abk'] = 'abkhazian',
+    ['ady'] = 'adyghe',
+    ['afk'] = 'afrikaans',
+    ['afr'] = 'afar',
+    ['agw'] = 'agaw',
+    ['als'] = 'alsatian',
+    ['alt'] = 'altai',
+    ['amh'] = 'amharic',
+    ['ara'] = 'arabic',
+    ['ari'] = 'aari',
+    ['ark'] = 'arakanese',
+    ['asm'] = 'assamese',
+    ['ath'] = 'athapaskan',
+    ['avr'] = 'avar',
+    ['awa'] = 'awadhi',
+    ['aym'] = 'aymara',
+    ['aze'] = 'azeri',
+    ['bad'] = 'badaga',
+    ['bag'] = 'baghelkhandi',
+    ['bal'] = 'balkar',
+    ['bau'] = 'baule',
+    ['bbr'] = 'berber',
+    ['bch'] = 'bench',
+    ['bcr'] = 'bible cree',
+    ['bel'] = 'belarussian',
+    ['bem'] = 'bemba',
+    ['ben'] = 'bengali',
+    ['bgr'] = 'bulgarian',
+    ['bhi'] = 'bhili',
+    ['bho'] = 'bhojpuri',
+    ['bik'] = 'bikol',
+    ['bil'] = 'bilen',
+    ['bkf'] = 'blackfoot',
+    ['bli'] = 'balochi',
+    ['bln'] = 'balante',
+    ['blt'] = 'balti',
+    ['bmb'] = 'bambara',
+    ['bml'] = 'bamileke',
+    ['bos'] = 'bosnian',
+    ['bre'] = 'breton',
+    ['brh'] = 'brahui',
+    ['bri'] = 'braj bhasha',
+    ['brm'] = 'burmese',
+    ['bsh'] = 'bashkir',
+    ['bti'] = 'beti',
+    ['cat'] = 'catalan',
+    ['ceb'] = 'cebuano',
+    ['che'] = 'chechen',
+    ['chg'] = 'chaha gurage',
+    ['chh'] = 'chattisgarhi',
+    ['chi'] = 'chichewa',
+    ['chk'] = 'chukchi',
+    ['chp'] = 'chipewyan',
+    ['chr'] = 'cherokee',
+    ['chu'] = 'chuvash',
+    ['cmr'] = 'comorian',
+    ['cop'] = 'coptic',
+    ['cos'] = 'corsican',
+    ['cre'] = 'cree',
+    ['crr'] = 'carrier',
+    ['crt'] = 'crimean tatar',
+    ['csl'] = 'church slavonic',
+    ['csy'] = 'czech',
+    ['dan'] = 'danish',
+    ['dar'] = 'dargwa',
+    ['dcr'] = 'woods cree',
+    ['deu'] = 'german',
+    ['dgr'] = 'dogri',
+    ['div'] = 'divehi',
+    ['djr'] = 'djerma',
+    ['dng'] = 'dangme',
+    ['dnk'] = 'dinka',
+    ['dri'] = 'dari',
+    ['dun'] = 'dungan',
+    ['dzn'] = 'dzongkha',
+    ['ebi'] = 'ebira',
+    ['ecr'] = 'eastern cree',
+    ['edo'] = 'edo',
+    ['efi'] = 'efik',
+    ['ell'] = 'greek',
+    ['eng'] = 'english',
+    ['erz'] = 'erzya',
+    ['esp'] = 'spanish',
+    ['eti'] = 'estonian',
+    ['euq'] = 'basque',
+    ['evk'] = 'evenki',
+    ['evn'] = 'even',
+    ['ewe'] = 'ewe',
+    ['fan'] = 'french antillean',
+    ['far'] = 'farsi',
+    ['fin'] = 'finnish',
+    ['fji'] = 'fijian',
+    ['fle'] = 'flemish',
+    ['fne'] = 'forest nenets',
+    ['fon'] = 'fon',
+    ['fos'] = 'faroese',
+    ['fra'] = 'french',
+    ['fri'] = 'frisian',
+    ['frl'] = 'friulian',
+    ['fta'] = 'futa',
+    ['ful'] = 'fulani',
+    ['gad'] = 'ga',
+    ['gae'] = 'gaelic',
+    ['gag'] = 'gagauz',
+    ['gal'] = 'galician',
+    ['gar'] = 'garshuni',
+    ['gaw'] = 'garhwali',
+    ['gez'] = "ge'ez",
+    ['gil'] = 'gilyak',
+    ['gmz'] = 'gumuz',
+    ['gon'] = 'gondi',
+    ['grn'] = 'greenlandic',
+    ['gro'] = 'garo',
+    ['gua'] = 'guarani',
+    ['guj'] = 'gujarati',
+    ['hai'] = 'haitian',
+    ['hal'] = 'halam',
+    ['har'] = 'harauti',
+    ['hau'] = 'hausa',
+    ['haw'] = 'hawaiin',
+    ['hbn'] = 'hammer-banna',
+    ['hil'] = 'hiligaynon',
+    ['hin'] = 'hindi',
+    ['hma'] = 'high mari',
+    ['hnd'] = 'hindko',
+    ['ho']  = 'ho',
+    ['hri'] = 'harari',
+    ['hrv'] = 'croatian',
+    ['hun'] = 'hungarian',
+    ['hye'] = 'armenian',
+    ['ibo'] = 'igbo',
+    ['ijo'] = 'ijo',
+    ['ilo'] = 'ilokano',
+    ['ind'] = 'indonesian',
+    ['ing'] = 'ingush',
+    ['inu'] = 'inuktitut',
+    ['iri'] = 'irish',
+    ['irt'] = 'irish traditional',
+    ['isl'] = 'icelandic',
+    ['ism'] = 'inari sami',
+    ['ita'] = 'italian',
+    ['iwr'] = 'hebrew',
+    ['jan'] = 'japanese',
+    ['jav'] = 'javanese',
+    ['jii'] = 'yiddish',
+    ['jud'] = 'judezmo',
+    ['jul'] = 'jula',
+    ['kab'] = 'kabardian',
+    ['kac'] = 'kachchi',
+    ['kal'] = 'kalenjin',
+    ['kan'] = 'kannada',
+    ['kar'] = 'karachay',
+    ['kat'] = 'georgian',
+    ['kaz'] = 'kazakh',
+    ['keb'] = 'kebena',
+    ['kge'] = 'khutsuri georgian',
+    ['kha'] = 'khakass',
+    ['khk'] = 'khanty-kazim',
+    ['khm'] = 'khmer',
+    ['khs'] = 'khanty-shurishkar',
+    ['khv'] = 'khanty-vakhi',
+    ['khw'] = 'khowar',
+    ['kik'] = 'kikuyu',
+    ['kir'] = 'kirghiz',
+    ['kis'] = 'kisii',
+    ['kkn'] = 'kokni',
+    ['klm'] = 'kalmyk',
+    ['kmb'] = 'kamba',
+    ['kmn'] = 'kumaoni',
+    ['kmo'] = 'komo',
+    ['kms'] = 'komso',
+    ['knr'] = 'kanuri',
+    ['kod'] = 'kodagu',
+    ['koh'] = 'korean old hangul',
+    ['kok'] = 'konkani',
+    ['kon'] = 'kikongo',
+    ['kop'] = 'komi-permyak',
+    ['kor'] = 'korean',
+    ['koz'] = 'komi-zyrian',
+    ['kpl'] = 'kpelle',
+    ['kri'] = 'krio',
+    ['krk'] = 'karakalpak',
+    ['krl'] = 'karelian',
+    ['krm'] = 'karaim',
+    ['krn'] = 'karen',
+    ['krt'] = 'koorete',
+    ['ksh'] = 'kashmiri',
+    ['ksi'] = 'khasi',
+    ['ksm'] = 'kildin sami',
+    ['kui'] = 'kui',
+    ['kul'] = 'kulvi',
+    ['kum'] = 'kumyk',
+    ['kur'] = 'kurdish',
+    ['kuu'] = 'kurukh',
+    ['kuy'] = 'kuy',
+    ['kyk'] = 'koryak',
+    ['lad'] = 'ladin',
+    ['lah'] = 'lahuli',
+    ['lak'] = 'lak',
+    ['lam'] = 'lambani',
+    ['lao'] = 'lao',
+    ['lat'] = 'latin',
+    ['laz'] = 'laz',
+    ['lcr'] = 'l-cree',
+    ['ldk'] = 'ladakhi',
+    ['lez'] = 'lezgi',
+    ['lin'] = 'lingala',
+    ['lma'] = 'low mari',
+    ['lmb'] = 'limbu',
+    ['lmw'] = 'lomwe',
+    ['lsb'] = 'lower sorbian',
+    ['lsm'] = 'lule sami',
+    ['lth'] = 'lithuanian',
+    ['ltz'] = 'luxembourgish',
+    ['lub'] = 'luba',
+    ['lug'] = 'luganda',
+    ['luh'] = 'luhya',
+    ['luo'] = 'luo',
+    ['lvi'] = 'latvian',
+    ['maj'] = 'majang',
+    ['mak'] = 'makua',
+    ['mal'] = 'malayalam traditional',
+    ['man'] = 'mansi',
+    ['map'] = 'mapudungun',
+    ['mar'] = 'marathi',
+    ['maw'] = 'marwari',
+    ['mbn'] = 'mbundu',
+    ['mch'] = 'manchu',
+    ['mcr'] = 'moose cree',
+    ['mde'] = 'mende',
+    ['men'] = "me'en",
+    ['miz'] = 'mizo',
+    ['mkd'] = 'macedonian',
+    ['mle'] = 'male',
+    ['mlg'] = 'malagasy',
+    ['mln'] = 'malinke',
+    ['mlr'] = 'malayalam reformed',
+    ['mly'] = 'malay',
+    ['mnd'] = 'mandinka',
+    ['mng'] = 'mongolian',
+    ['mni'] = 'manipuri',
+    ['mnk'] = 'maninka',
+    ['mnx'] = 'manx gaelic',
+    ['moh'] = 'mohawk',
+    ['mok'] = 'moksha',
+    ['mol'] = 'moldavian',
+    ['mon'] = 'mon',
+    ['mor'] = 'moroccan',
+    ['mri'] = 'maori',
+    ['mth'] = 'maithili',
+    ['mts'] = 'maltese',
+    ['mun'] = 'mundari',
+    ['nag'] = 'naga-assamese',
+    ['nan'] = 'nanai',
+    ['nas'] = 'naskapi',
+    ['ncr'] = 'n-cree',
+    ['ndb'] = 'ndebele',
+    ['ndg'] = 'ndonga',
+    ['nep'] = 'nepali',
+    ['new'] = 'newari',
+    ['ngr'] = 'nagari',
+    ['nhc'] = 'norway house cree',
+    ['nis'] = 'nisi',
+    ['niu'] = 'niuean',
+    ['nkl'] = 'nkole',
+    ['nko'] = "n'ko",
+    ['nld'] = 'dutch',
+    ['nog'] = 'nogai',
+    ['nor'] = 'norwegian',
+    ['nsm'] = 'northern sami',
+    ['nta'] = 'northern tai',
+    ['nto'] = 'esperanto',
+    ['nyn'] = 'nynorsk',
+    ['oci'] = 'occitan',
+    ['ocr'] = 'oji-cree',
+    ['ojb'] = 'ojibway',
+    ['ori'] = 'oriya',
+    ['oro'] = 'oromo',
+    ['oss'] = 'ossetian',
+    ['paa'] = 'palestinian aramaic',
+    ['pal'] = 'pali',
+    ['pan'] = 'punjabi',
+    ['pap'] = 'palpa',
+    ['pas'] = 'pashto',
+    ['pgr'] = 'polytonic greek',
+    ['pil'] = 'pilipino',
+    ['plg'] = 'palaung',
+    ['plk'] = 'polish',
+    ['pro'] = 'provencal',
+    ['ptg'] = 'portuguese',
+    ['qin'] = 'chin',
+    ['raj'] = 'rajasthani',
+    ['rbu'] = 'russian buriat',
+    ['rcr'] = 'r-cree',
+    ['ria'] = 'riang',
+    ['rms'] = 'rhaeto-romanic',
+    ['rom'] = 'romanian',
+    ['roy'] = 'romany',
+    ['rsy'] = 'rusyn',
+    ['rua'] = 'ruanda',
+    ['rus'] = 'russian',
+    ['sad'] = 'sadri',
+    ['san'] = 'sanskrit',
+    ['sat'] = 'santali',
+    ['say'] = 'sayisi',
+    ['sek'] = 'sekota',
+    ['sel'] = 'selkup',
+    ['sgo'] = 'sango',
+    ['shn'] = 'shan',
+    ['sib'] = 'sibe',
+    ['sid'] = 'sidamo',
+    ['sig'] = 'silte gurage',
+    ['sks'] = 'skolt sami',
+    ['sky'] = 'slovak',
+    ['sla'] = 'slavey',
+    ['slv'] = 'slovenian',
+    ['sml'] = 'somali',
+    ['smo'] = 'samoan',
+    ['sna'] = 'sena',
+    ['snd'] = 'sindhi',
+    ['snh'] = 'sinhalese',
+    ['snk'] = 'soninke',
+    ['sog'] = 'sodo gurage',
+    ['sot'] = 'sotho',
+    ['sqi'] = 'albanian',
+    ['srb'] = 'serbian',
+    ['srk'] = 'saraiki',
+    ['srr'] = 'serer',
+    ['ssl'] = 'south slavey',
+    ['ssm'] = 'southern sami',
+    ['sur'] = 'suri',
+    ['sva'] = 'svan',
+    ['sve'] = 'swedish',
+    ['swa'] = 'swadaya aramaic',
+    ['swk'] = 'swahili',
+    ['swz'] = 'swazi',
+    ['sxt'] = 'sutu',
+    ['syr'] = 'syriac',
+    ['tab'] = 'tabasaran',
+    ['taj'] = 'tajiki',
+    ['tam'] = 'tamil',
+    ['tat'] = 'tatar',
+    ['tcr'] = 'th-cree',
+    ['tel'] = 'telugu',
+    ['tgn'] = 'tongan',
+    ['tgr'] = 'tigre',
+    ['tgy'] = 'tigrinya',
+    ['tha'] = 'thai',
+    ['tht'] = 'tahitian',
+    ['tib'] = 'tibetan',
+    ['tkm'] = 'turkmen',
+    ['tmn'] = 'temne',
+    ['tna'] = 'tswana',
+    ['tne'] = 'tundra nenets',
+    ['tng'] = 'tonga',
+    ['tod'] = 'todo',
+    ['trk'] = 'turkish',
+    ['tsg'] = 'tsonga',
+    ['tua'] = 'turoyo aramaic',
+    ['tul'] = 'tulu',
+    ['tuv'] = 'tuvin',
+    ['twi'] = 'twi',
+    ['udm'] = 'udmurt',
+    ['ukr'] = 'ukrainian',
+    ['urd'] = 'urdu',
+    ['usb'] = 'upper sorbian',
+    ['uyg'] = 'uyghur',
+    ['uzb'] = 'uzbek',
+    ['ven'] = 'venda',
+    ['vit'] = 'vietnamese',
+    ['wa' ] = 'wa',
+    ['wag'] = 'wagdi',
+    ['wcr'] = 'west-cree',
+    ['wel'] = 'welsh',
+    ['wlf'] = 'wolof',
+    ['xbd'] = 'tai lue',
+    ['xhs'] = 'xhosa',
+    ['yak'] = 'yakut',
+    ['yba'] = 'yoruba',
+    ['ycr'] = 'y-cree',
+    ['yic'] = 'yi classic',
+    ['yim'] = 'yi modern',
+    ['zhh'] = 'chinese hong kong',
+    ['zhp'] = 'chinese phonetic',
+    ['zhs'] = 'chinese simplified',
+    ['zht'] = 'chinese traditional',
+    ['znd'] = 'zande',
+    ['zul'] = 'zulu'
+}
+
+local features = {
+    ['aalt'] = 'access all alternates',
+    ['abvf'] = 'above-base forms',
+    ['abvm'] = 'above-base mark positioning',
+    ['abvs'] = 'above-base substitutions',
+    ['afrc'] = 'alternative fractions',
+    ['akhn'] = 'akhands',
+    ['blwf'] = 'below-base forms',
+    ['blwm'] = 'below-base mark positioning',
+    ['blws'] = 'below-base substitutions',
+    ['c2pc'] = 'petite capitals from capitals',
+    ['c2sc'] = 'small capitals from capitals',
+    ['calt'] = 'contextual alternates',
+    ['case'] = 'case-sensitive forms',
+    ['ccmp'] = 'glyph composition/decomposition',
+    ['cjct'] = 'conjunct forms',
+    ['clig'] = 'contextual ligatures',
+    ['cpsp'] = 'capital spacing',
+    ['cswh'] = 'contextual swash',
+    ['curs'] = 'cursive positioning',
+    ['dflt'] = 'default processing',
+    ['dist'] = 'distances',
+    ['dlig'] = 'discretionary ligatures',
+    ['dnom'] = 'denominators',
+    ['dtls'] = 'dotless forms', -- math
+    ['expt'] = 'expert forms',
+    ['falt'] = 'final glyph alternates',
+    ['fin2'] = 'terminal forms #2',
+    ['fin3'] = 'terminal forms #3',
+    ['fina'] = 'terminal forms',
+    ['flac'] = 'flattened accents over capitals', -- math
+    ['frac'] = 'fractions',
+    ['fwid'] = 'full width',
+    ['half'] = 'half forms',
+    ['haln'] = 'halant forms',
+    ['halt'] = 'alternate half width',
+    ['hist'] = 'historical forms',
+    ['hkna'] = 'horizontal kana alternates',
+    ['hlig'] = 'historical ligatures',
+    ['hngl'] = 'hangul',
+    ['hojo'] = 'hojo kanji forms',
+    ['hwid'] = 'half width',
+    ['init'] = 'initial forms',
+    ['isol'] = 'isolated forms',
+    ['ital'] = 'italics',
+    ['jalt'] = 'justification alternatives',
+    ['jp04'] = 'jis2004 forms',
+    ['jp78'] = 'jis78 forms',
+    ['jp83'] = 'jis83 forms',
+    ['jp90'] = 'jis90 forms',
+    ['kern'] = 'kerning',
+    ['lfbd'] = 'left bounds',
+    ['liga'] = 'standard ligatures',
+    ['ljmo'] = 'leading jamo forms',
+    ['lnum'] = 'lining figures',
+    ['locl'] = 'localized forms',
+    ['mark'] = 'mark positioning',
+    ['med2'] = 'medial forms #2',
+    ['medi'] = 'medial forms',
+    ['mgrk'] = 'mathematical greek',
+    ['mkmk'] = 'mark to mark positioning',
+    ['mset'] = 'mark positioning via substitution',
+    ['nalt'] = 'alternate annotation forms',
+    ['nlck'] = 'nlc kanji forms',
+    ['nukt'] = 'nukta forms',
+    ['numr'] = 'numerators',
+    ['onum'] = 'old style figures',
+    ['opbd'] = 'optical bounds',
+    ['ordn'] = 'ordinals',
+    ['ornm'] = 'ornaments',
+    ['palt'] = 'proportional alternate width',
+    ['pcap'] = 'petite capitals',
+    ['pnum'] = 'proportional figures',
+    ['pref'] = 'pre-base forms',
+    ['pres'] = 'pre-base substitutions',
+    ['pstf'] = 'post-base forms',
+    ['psts'] = 'post-base substitutions',
+    ['pwid'] = 'proportional widths',
+    ['qwid'] = 'quarter widths',
+    ['rand'] = 'randomize',
+    ['rkrf'] = 'rakar forms',
+    ['rlig'] = 'required ligatures',
+    ['rphf'] = 'reph form',
+    ['rtbd'] = 'right bounds',
+    ['rtla'] = 'right-to-left alternates',
+    ['rtlm'] = 'right to left math', -- math
+    ['ruby'] = 'ruby notation forms',
+    ['salt'] = 'stylistic alternates',
+    ['sinf'] = 'scientific inferiors',
+    ['size'] = 'optical size',
+    ['smcp'] = 'small capitals',
+    ['smpl'] = 'simplified forms',
+ -- ['ss01'] = 'stylistic set 1',
+ -- ['ss02'] = 'stylistic set 2',
+ -- ['ss03'] = 'stylistic set 3',
+ -- ['ss04'] = 'stylistic set 4',
+ -- ['ss05'] = 'stylistic set 5',
+ -- ['ss06'] = 'stylistic set 6',
+ -- ['ss07'] = 'stylistic set 7',
+ -- ['ss08'] = 'stylistic set 8',
+ -- ['ss09'] = 'stylistic set 9',
+ -- ['ss10'] = 'stylistic set 10',
+ -- ['ss11'] = 'stylistic set 11',
+ -- ['ss12'] = 'stylistic set 12',
+ -- ['ss13'] = 'stylistic set 13',
+ -- ['ss14'] = 'stylistic set 14',
+ -- ['ss15'] = 'stylistic set 15',
+ -- ['ss16'] = 'stylistic set 16',
+ -- ['ss17'] = 'stylistic set 17',
+ -- ['ss18'] = 'stylistic set 18',
+ -- ['ss19'] = 'stylistic set 19',
+ -- ['ss20'] = 'stylistic set 20',
+    ['ssty'] = 'script style', -- math
+    ['subs'] = 'subscript',
+    ['sups'] = 'superscript',
+    ['swsh'] = 'swash',
+    ['titl'] = 'titling',
+    ['tjmo'] = 'trailing jamo forms',
+    ['tnam'] = 'traditional name forms',
+    ['tnum'] = 'tabular figures',
+    ['trad'] = 'traditional forms',
+    ['twid'] = 'third widths',
+    ['unic'] = 'unicase',
+    ['valt'] = 'alternate vertical metrics',
+    ['vatu'] = 'vattu variants',
+    ['vert'] = 'vertical writing',
+    ['vhal'] = 'alternate vertical half metrics',
+    ['vjmo'] = 'vowel jamo forms',
+    ['vkna'] = 'vertical kana alternates',
+    ['vkrn'] = 'vertical kerning',
+    ['vpal'] = 'proportional alternate vertical metrics',
+    ['vrt2'] = 'vertical rotation',
+    ['zero'] = 'slashed zero',
+
+    ['trep'] = 'traditional tex replacements',
+    ['tlig'] = 'traditional tex ligatures',
+
+    ['ss..'] = 'stylistic set ..',
+    ['cv..'] = 'character variant ..',
+    ['js..'] = 'justification ..',
+
+    ["dv.."] = "devanagari ..",
+}
+
+local baselines = {
+    ['hang'] = 'hanging baseline',
+    ['icfb'] = 'ideographic character face bottom edge baseline',
+    ['icft'] = 'ideographic character face tope edige baseline',
+    ['ideo'] = 'ideographic em-box bottom edge baseline',
+    ['idtp'] = 'ideographic em-box top edge baseline',
+    ['math'] = 'mathmatical centered baseline',
+    ['romn'] = 'roman baseline'
+}
+
+local swapped = function (h)
+    local r = { }
+    for k, v in next, h do
+        r[stringgsub(v,"[^a-z0-9]","")] = k -- is already lower
+    end
+    return r
+end
+
+local verbosescripts   = swapped(scripts  )
+local verboselanguages = swapped(languages)
+local verbosefeatures  = swapped(features )
+local verbosebaselines = swapped(baselines)
+
+---[[ end excerpt from font-ott.lua ]]
+
 --[[doc--
 
     As discussed, we will issue a warning because of incomplete support
@@ -118,12 +752,35 @@ local support_incomplete = table.tohash({
 --- (string, string) dict -> (string, string) dict
 local set_default_features = function (speclist)
     speclist = speclist or { }
-    local script = speclist.script or "dflt"
-    if support_incomplete[script] then
-        report("log", 0, "load",
-            "support for the requested script: “%s” may be incomplete",
-            script)
+
+    --- handle language tag
+    local language = speclist.language
+    if language then --- already lowercase at this point
+        language = stringgsub(language, "[^a-z0-9]", "")
+        language = rawget(verboselanguages, language) -- srsly, rawget?
+                or (languages[language] and language)
+                or "dflt"
+    else
+        language = "dflt"
+    end
+    speclist.language = language
+
+    --- handle script tag
+    local script = speclist.script
+    if script then
+        script = stringgsub(script, "[^a-z0-9]","")
+        script = rawget(verbosescripts, script)
+              or (scripts[script] and script)
+              or "dflt"
+        if support_incomplete[script] then
+            report("log", 0, "load",
+                "support for the requested script: "
+                .. "“%s” may be incomplete", script)
+        end
+    else
+        script = "dflt"
     end
+    speclist.script = script
 
     report("log", 0, "load",
         "auto-selecting default features for script: %s",