How to add New Regional Language Translation in koha | How to Change koha language.

Koha supports many language translations.

You can add a new language (e.g. தமிழ்) by using the following steps,

Open Applications > System tools > Terminal Apply following commands,

sudo su 

export KOHA_CONF=/etc/koha/sites/library/koha-conf.xml

export PERL5LIB=/usr/share/koha/lib

cd /usr/share/koha/misc/translator

perl translate install <language-code>

sudo koha-translate --install <language-code>

Language	Code 2	Code 3
English	en	eng
தமிழ்	ta	tam
हिंदी	hi	hin

Change Language from Administration > System Preferences > I18N/L10N > Language.

                                                                  More Languages Code

This table lists ISO 639-1 (alpha-2 code) and ISO 639-2 (alpha-3 code).

English Name	Code2	Code3	French name
Afar	aa	aar	afar
Abkhazian	ab	abk	abkhaze
Avestan	ae	ave	avestique
Afrikaans	af	afr	afrikaans
Akan	ak	aka	akan
Amharic	am	amh	amharique
Aragonese	an	arg	aragonais
Arabic	ar	ara	arabe
Assamese	as	asm	assamais
Avaric	av	ava	avar
Aymara	ay	aym	aymara
Azerbaijani	az	aze	azéri
Bashkir	ba	bak	bachkir
Belarusian	be	bel	biélorusse
Bulgarian	bg	bul	bulgare
Bihari languages	bh	bih	langues biharis
Bislama	bi	bis	bichlamar
Bambara	bm	bam	bambara
Bengali	bn	ben	bengali
Tibetan	bo	tib	tibétain
Breton	br	bre	breton
Bosnian	bs	bos	bosniaque
Catalan; Valencian	ca	cat	catalan; valencien
Chechen	ce	che	tchétchène
Chamorro	ch	cha	chamorro
Corsican	co	cos	corse
Cree	cr	cre	cree
Czech	cs	cze	tchèque
Church Slavic; Slavonic; Old Bulgarian	cu	chu	slavon d'église; slavon liturgique; vieux bulgare
Chuvash	cv	chv	tchouvache
Welsh	cy	wel	gallois
Danish	da	dan	danois
German	de	ger	allemand
Divehi; Dhivehi; Maldivian	dv	div	maldivien
Dzongkha	dz	dzo	dzongkha
Ewe	ee	ewe	éwé
Greek, Modern (1453-)	el	gre	grec moderne (après 1453)
English	en	eng	anglais
Esperanto	eo	epo	espéranto
Spanish; Castilian	es	spa	espagnol; castillan
Estonian	et	est	estonien
Basque	eu	baq	basque
Persian	fa	per	persan
Fulah	ff	ful	peul
Finnish	fi	fin	finnois
Fijian	fj	fij	fidjien
Faroese	fo	fao	féroïen
French	fr	fre	français
Western Frisian	fy	fry	frison occidental
Irish	ga	gle	irlandais
Gaelic; Scottish Gaelic	gd	gla	gaélique; gaélique écossais
Galician	gl	glg	galicien
Guarani	gn	grn	guarani
Gujarati	gu	guj	goudjrati
Manx	gv	glv	manx; mannois
Hausa	ha	hau	haoussa
Hebrew	he	heb	hébreu
Hindi	hi	hin	hindi
Hiri Motu	ho	hmo	hiri motu
Croatian	hr	hrv	croate
Haitian; Haitian Creole	ht	hat	haïtien; créole haïtien
Hungarian	hu	hun	hongrois
Armenian	hy	arm	arménien
Herero	hz	her	herero
Interlingua	ia	ina	interlingua (langue auxiliaire internationale)
Indonesian	id	ind	indonésien
Interlingue; Occidental	ie	ile	interlingue
Igbo	ig	ibo	igbo
Sichuan Yi; Nuosu	ii	iii	yi de Sichuan
Inupiaq	ik	ipk	inupiaq
Ido	io	ido	ido
Icelandic	is	ice	islandais
Italian	it	ita	italien
Inuktitut	iu	iku	inuktitut
Japanese	ja	jpn	japonais
Javanese	jv	jav	javanais
Georgian	ka	geo	géorgien
Kongo	kg	kon	kongo
Kikuyu; Gikuyu	ki	kik	kikuyu
Kuanyama; Kwanyama	kj	kua	kuanyama; kwanyama
Kazakh	kk	kaz	kazakh
Kalaallisut; Greenlandic	kl	kal	groenlandais
Central Khmer	km	khm	khmer central
Kannada	kn	kan	kannada
Korean	ko	kor	coréen
Kanuri	kr	kau	kanouri
Kashmiri	ks	kas	kashmiri
Kurdish	ku	kur	kurde
Komi	kv	kom	kom
Cornish	kw	cor	cornique
Kirghiz; Kyrgyz	ky	kir	kirghiz
Latin	la	lat	latin
Luxembourgish; Letzeburgesch	lb	ltz	luxembourgeois
Ganda	lg	lug	ganda
Limburgan; Limburger; Limburgish	li	lim	limbourgeois
Lingala	ln	lin	lingala
Lao	lo	lao	lao
Lithuanian	lt	lit	lituanien
Luba-Katanga	lu	lub	luba-katanga
Latvian	lv	lav	letton
Malagasy	mg	mlg	malgache
Marshallese	mh	mah	marshall
Maori	mi	mao	maori
Macedonian	mk	mac	macédonien
Malayalam	ml	mal	malayalam
Mongolian	mn	mon	mongol
Marathi	mr	mar	marathe
Malay	ms	may	malais
Maltese	mt	mlt	maltais
Burmese	my	bur	birman
Nauru	na	nau	nauruan
Bokmål, Norwegian; Norwegian Bokmål	nb	nob	norvégien bokmål
Ndebele, North; North Ndebele	nd	nde	ndébélé du Nord
Nepali	ne	nep	népalais
Ndonga	ng	ndo	ndonga
Dutch; Flemish	nl	dut	néerlandais; flamand
Norwegian Nynorsk; Nynorsk, Norwegian	nn	nno	norvégien nynorsk; nynorsk, norvégien
Norwegian	no	nor	norvégien
Ndebele, South; South Ndebele	nr	nbl	ndébélé du Sud
Navajo; Navaho	nv	nav	navaho
Chichewa; Chewa; Nyanja	ny	nya	chichewa; chewa; nyanja
Occitan (post 1500)	oc	oci	occitan (après 1500)
Ojibwa	oj	oji	ojibwa
Oromo	om	orm	galla
Oriya	or	ori	oriya
Ossetian; Ossetic	os	oss	ossète
Panjabi; Punjabi	pa	pan	pendjabi
Pali	pi	pli	pali
Polish	pl	pol	polonais
Pushto; Pashto	ps	pus	pachto
Portuguese	pt	por	portugais
Quechua	qu	que	quechua
Romansh	rm	roh	romanche
Rundi	rn	run	rundi
Romanian; Moldavian; Moldovan	ro	rum	roumain; moldave
Russian	ru	rus	russe
Kinyarwanda	rw	kin	rwanda
Sanskrit	sa	san	sanskrit
Sardinian	sc	srd	sarde
Sindhi	sd	snd	sindhi
Northern Sami	se	sme	sami du Nord
Sango	sg	sag	sango
Sinhala; Sinhalese	si	sin	singhalais
Slovak	sk	slo	slovaque
Slovenian	sl	slv	slovène
Samoan	sm	smo	samoan
Shona	sn	sna	shona
Somali	so	som	somali
Albanian	sq	alb	albanais
Serbian	sr	srp	serbe
Swati	ss	ssw	swati
Sotho, Southern	st	sot	sotho du Sud
Sundanese	su	sun	soundanais
Swedish	sv	swe	suédois
Swahili	sw	swa	swahili
Tamil	ta	tam	tamoul
Telugu	te	tel	télougou
Tajik	tg	tgk	tadjik
Thai	th	tha	thaï
Tigrinya	ti	tir	tigrigna
Turkmen	tk	tuk	turkmène
Tagalog	tl	tgl	tagalog
Tswana	tn	tsn	tswana
Tonga (Tonga Islands)	to	ton	tongan (Îles Tonga)
Turkish	tr	tur	turc
Tsonga	ts	tso	tsonga
Tatar	tt	tat	tatar
Twi	tw	twi	twi
Tahitian	ty	tah	tahitien
Uighur; Uyghur	ug	uig	ouïgour
Ukrainian	uk	ukr	ukrainien
Urdu	ur	urd	ourdou
Uzbek	uz	uzb	ouszbek
Venda	ve	ven	venda
Vietnamese	vi	vie	vietnamien
Volapük	vo	vol	volapük
Walloon	wa	wln	wallon
Wolof	wo	wol	wolof
Xhosa	xh	xho	xhosa
Yiddish	yi	yid	yiddish
Yoruba	yo	yor	yoruba
Zhuang; Chuang	za	zha	zhuang; chuang
Chinese	zh	chi	chinois
Zulu	zu	zul	zoulou