[BUG] Language parsing in idx/sub: old DVD language codes

It seems that DVD specification uses some deprecated version of ISO 639-1 for setting language codes, which messes up the language selection dropdown box in SE's Import Vobsub dialog. What happens is the track with the unknown code takes the Language name of the following track, which ripples down the rest of the list pulling all other track names out of sync, and the final track then gets marked as "Unknown language". Here's a sample file with Hebrew (iw) being the offender.

I compared the list of language codes used by the DVD spec (see p. 186 here or p. 525 here) with the current ISO 639-1 and these are the differences:

DVD code	ISO 639-1	Language name	Change notice
in	id	Indonesian	changed 1989-03-11
iw	he	Hebrew	changed 1989-03-11
ji	yi	Yiddish	changed 1989-03-11
jw	jv	Javanese	“jw” published in error; withdrawn in favor of “jv”, 2001-08-13
mo	ro	Romanian	“mo” for Moldavian has been withdrawn, recommending “ro” also for Moldavian, 2008-11-03
sh	bs	Bosnian	Serbo-Croatian was deprecated in 2000 in favor of separate codes for each individual language (Serbian, Croatian, and then Bosnian was added), 2000-02-18 [since Serbian and Croatian were already present in the old DVD code list it’s probably best to map it to Bosnian]

And here's the full list of DVD codes in case someone needs it for future reference:

Language name	Code	Hex	Decimal	Native name
Abkhaz	ab	6162	24930	аҧсуа бызшәа, аҧсшәа
Afar	aa	6161	24929	Afaraf
Afrikaans	af	6166	24934	Afrikaans
Albanian	sq	7371	29553	Shqip
Amharic	am	616D	24941	አማርኛ
Arabic	ar	6172	24946	العربية
Armenian	hy	6879	26745	Հայերեն
Assamese	as	6173	24947	অসমীয়া
Aymara	ay	6179	24953	aymar aru
Azerbaijani	az	617A	24954	azərbaycan dili
Bashkir	ba	6261	25185	башҡорт теле
Basque	eu	6575	25973	euskara, euskera
Belarusian	be	6265	25189	беларуская мова
Bengali, Bangla	bn	626E	25198	বাংলা
Bihari	bh	6268	25192	भोजपुरी
Bislama	bi	6269	25193	Bislama
Breton	br	6272	25202	brezhoneg
Bulgarian	bg	6267	25191	български език
Burmese	my	6D79	28025	ဗမာစာ
Catalan	ca	6361	25441	català
Chinese	zh	7A68	31336	中文 (Zhōngwén), 汉语, 漢語
Corsican	co	636F	25455	corsu, lingua corsa
Croatian	hr	6872	26738	hrvatski jezik
Czech	cs	6373	25459	čeština, český jazyk
Danish	da	6461	25697	dansk
Dutch	nl	6E6C	28268	Nederlands, Vlaams
Dzongkha	dz	647A	25722	རྫོང་ཁ
English	en	656E	25966	English
Esperanto	eo	656F	25967	Esperanto
Estonian	et	6574	25972	eesti, eesti keel
Faroese	fo	666F	26223	føroyskt
Fijian	fj	666A	26218	vosa Vakaviti
Finnish	fi	6669	26217	suomi, suomen kieli
French	fr	6672	26226	français, langue française
Galician	gl	676C	26476	galego
Georgian	ka	6B61	27489	ქართული
German	de	6465	25701	Deutsch
Greek	el	656C	25964	ελληνικά
Guaraní	gn	676E	26478	Avañe'ẽ
Gujarati	gu	6775	26485	ગુજરાતી
Hausa	ha	6861	26721	(Hausa) هَوُسَ
Hebrew	iw	6977	26999	עברית
Hindi	hi	6869	26729	हिन्दी, हिंदी
Hungarian	hu	6875	26741	magyar
Icelandic	is	6973	26995	Íslenska
Indonesian	in	696E	26990	Bahasa Indonesia
Interlingua	ia	6961	26977	Interlingua
Interlingue	ie	6965	26981	Originally called Occidental; then Interlingue after WWII
Inupiaq	ik	696B	26987	Iñupiaq, Iñupiatun
Irish	ga	6761	26465	Gaeilge
Italian	it	6974	26996	italiano
Japanese	ja	6A61	27233	日本語 (にほんご)
Javanese	jw	6A77	27255	basa Jawa
Kalaallisut, Greenlandic	kl	6B6C	27500	kalaallisut, kalaallit oqaasii
Kannada	kn	6B6E	27502	ಕನ್ನಡ
Kashmiri	ks	6B73	27507	कश्मीरी, كشميري‎
Kazakh	kk	6B6B	27499	қазақ тілі
Khmer	km	6B6D	27501	ខ្មែរ, ខេមរភាសា, ភាសាខ្មែរ
Kinyarwanda	rw	7277	29303	Ikinyarwanda
Kirundi	rn	726E	29294	Ikirundi
Korean	ko	6B6F	27503	한국어, 조선어
Kurdish	ku	6B75	27509	Kurdî, كوردی‎
Kyrgyz	ky	6B79	27513	Кыргызча, Кыргыз тили
Lao	lo	6C6F	27759	ພາສາລາວ
Latin	la	6C61	27745	latine, lingua latina
Latvian	lv	6C76	27766	latviešu valoda
Lingala	ln	6C6E	27758	Lingála
Lithuanian	lt	6C74	27764	lietuvių kalba
Macedonian	mk	6D6B	28011	македонски јазик
Malagasy	mg	6D67	28007	fiteny malagasy
Malay	ms	6D73	28019	bahasa Melayu, بهاس ملايو‎
Malayalam	ml	6D6C	28012	മലയാളം
Maltese	mt	6D74	28020	Malti
Māori	mi	6D69	28009	te reo Māori
Marathi (Marāṭhī)	mr	6D72	28018	मराठी
Moldavian, Moldovan	mo	6D6F	28015	limba moldovenească, лимба молдовеняскэ
Mongolian	mn	6D6E	28014	Монгол хэл
Nauruan	na	6E61	28257	Dorerin Naoero
Nepali	ne	6E65	28261	नेपाली
Norwegian	no	6E6F	28271	Norsk
Occitan	oc	6F63	28515	occitan, lenga d'òc
Oriya	or	6F72	28530	ଓଡ଼ିଆ
Oromo	om	6F6D	28525	Afaan Oromoo
Panjabi, Punjabi	pa	7061	28769	ਪੰਜਾਬੀ, پنجابی‎
Pashto, Pushto	ps	7073	28787	پښتو
Persian (Farsi)	fa	6661	26209	فارسی
Polish	pl	706C	28780	język polski, polszczyzna
Portuguese	pt	7074	28788	português
Quechua	qu	7175	29045	Runa Simi, Kichwa
Romanian	ro	726F	29295	limba română
Romansh	rm	726D	29293	rumantsch grischun
Russian	ru	7275	29301	Русский
Samoan	sm	736D	29549	gagana fa'a Samoa
Sango	sg	7367	29543	yângâ tî sängö
Sanskrit (Saṁskṛta)	sa	7361	29537	संस्कृतम्
Scottish Gaelic, Gaelic	gd	6764	26468	Gàidhlig
Serbian	sr	7372	29554	српски језик
Serbo-Croatian	sh	7368	29544	srpskohrvatski jezik
Shona	sn	736E	29550	chiShona
Sindhi	sd	7364	29540	सिन्धी, سنڌي، سندھی‎
Sinhala, Sinhalese	si	7369	29545	සිංහල
Slovak	sk	736B	29547	slovenčina, slovenský jazyk
Slovene	sl	736C	29548	slovenski jezik, slovenščina
Somali	so	736F	29551	Soomaaliga, af Soomaali
Southern Sotho	st	7374	29556	Sesotho
Spanish	es	6573	25971	español
Sundanese	su	7375	29557	Basa Sunda
Swahili	sw	7377	29559	Kiswahili
Swati	ss	7373	29555	SiSwati
Swedish	sv	7376	29558	svenska
Tagalog	tl	746C	29804	Wikang Tagalog, ᜏᜒᜃᜅ᜔ ᜆᜄᜎᜓᜄ᜔
Tajik	tg	7467	29799	тоҷикӣ, toçikī, تاجیکی‎
Tamil	ta	7461	29793	தமிழ்
Tatar	tt	7474	29812	татар теле, tatar tele
Telugu	te	7465	29797	తెలుగు
Thai	th	7468	29800	ไทย
Tibetan Standard, Tibetan, Central	bo	626F	25199	བོད་ཡིག
Tigrinya	ti	7469	29801	ትግርኛ
Tonga (Tonga Islands)	to	746F	29807	faka Tonga
Tsonga	ts	7473	29811	Xitsonga
Tswana	tn	746E	29806	Setswana
Turkish	tr	7472	29810	Türkçe
Turkmen	tk	746B	29803	Türkmen, Түркмен
Twi	tw	7477	29815	Twi
Ukrainian	uk	756B	30059	Українська
Urdu	ur	7572	30066	اردو
Uzbek	uz	757A	30074	Oʻzbek, Ўзбек, أۇزبېك‎
Vietnamese	vi	7669	30313	Tiếng Việt
Volapük	vo	766F	30319	Volapük
Welsh	cy	6379	25465	Cymraeg
Western Frisian	fy	6679	26233	Frysk
Wolof	wo	776F	30575	Wollof
Xhosa	xh	7868	30824	isiXhosa
Yiddish	ji	6A69	27241	ייִדיש
Yoruba	yo	796F	31087	Yorùbá
Zulu	zu	7A75	31349	isiZulu

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[BUG] Language parsing in idx/sub: old DVD language codes #1675