The JSI Wikifier currently supports the following languages. The code given in the “Primary code” column is the one under which the language appears in the Wikipedia; any other ISO-639 codes for that language are also accepted by the Wikifier and are listed in the “Aliases” column.

Primary code	Aliases	Name
af	afr	Afrikaans
als	gsw, gct, swg, wae	Alemannic
am	amh	Amharic
an	arg	Aragonese
ar	ara	Arabic
arz		Egyptian Arabic
ast		Asturian
az	aze	Azerbaijani
ba	bak	Bashkir
bar		Bavarian
bat-smg	sgs	Samogitian
be	bel	Belarusian
be-x-old	be-tarask	Belarusian (Taraškievica)
bg	bul	Bulgarian
bn	ben	Bengali
bpy		Bishnupriya Manipuri
br	bre, xbm, obt	Breton
bs	bos	Bosnian
bug		Bugainese
ca	cat	Catalan
ce	che	Chechen
ceb		Cebuano
ckb		Sorani
cs	ces, cze	Czech
cv	chv	Chuvash
cy	wel, cym	Welsh
da	dan	Danish
de	deu, ger	German
el	ell, gre	Greek
en	eng	English
eo	epo	Esperanto
es	spa	Spanish
et	est	Estonian
eu	eus, baq	Basque
fa	fas, per	Persian
fi	fin	Finnish
fo	fao	Faroese
fr	fra, fre	French
fy	fry	West Frisian
ga	gle	Irish
gd	gla	Scottish Gaelic
gl	glg	Galician
gu	guj	Gujarati
he	heb	Hebrew
hi	hin	Hindi
hr	hrv	Croatian
hsb		Upper Sorbian
ht	hat	Haitian
hu	hun	Hungarian
hy	hye, arm	Armenian
ia	ina	Interlingua
id	ind	Indonesian
io	ido	Ido
is	isl, ice	Icelandic
it	ita	Italian
ja	jpn	Japanese
jv	jav, jvn, jas, osi, tes, kaw	Javanese
ka	kat, geo	Georgian
kk	kaz	Kazakh
kn	kan	Kannada
ko	kor	Korean
ku	kur, kmr, sdh	Kurdish
ky	kir	Kirghiz
la	lat	Latin
lb	ltz	Luxembourgish
li	lim	Limburgish
lmo		Lombard
lt	lit	Lithuanian
lv	lav	Latvian
map-bms		Banyumasan
mg	mlg, xmv, bhr, buc, msh, bmm, plt, skg, bzc, tdx, txy, tkg, xmw	Malagasy
min	zmi	Minangkabau
mk	mkd, mac	Macedonian
ml	mal	Malayalam
mn	khk, mon, mvf	Mongolian
mo		Moldovan
mr	mar, omr	Marathi
mrj		Hill Mari
ms	msa, may	Malay
my	bur, mya, int, tvn, tco, rki, rmz	Burmese
mzn	srz	Mazandarani
nah	nci	Nahuatl
nap		Neapolitan
nds		Low Saxon
ne	nep, npi, dty	Nepali
new	nwx	Newar
nl	nld, dut	Dutch
nn	nno	Norwegian (Nynorsk)
no	nob, nb	Norwegian (Bokmål)
oc	oci	Occitan
or	ori, ory, spv, ort, dso	Oriya
os	oss	Ossetian
pa	pan, bhd, bht, kfs, cdh, cdj, doi, dgo, gbk, kjo, hii, jns, xnr, kfx, bfz, mjl, pgg, srx	Punjabi
pl	pol	Polish
pms		Piedmontese
pnb	lah, jat, hno, phr, skr, hnd, xhe	Western Punjabi
pt	por	Portuguese
qu	que, qwe	Quechua
ro	ron, rum	Romanian
ru	rus	Russian
sa	san	Sanskrit
sah		Sakha
sc	srd	Sardinian
scn		Sicilian
sco		Scots
sh	scr, scc, hbs	Serbo-Croatian
si	sin	Sinhalese
simple		Simple English
sk	slk, slo	Slovak
sl	slv	Slovenian
sq	sqi, alb	Albanian
sr	srp	Serbian
su	sun, bac	Sundanese
sv	swe	Swedish
sw	swa, swc, swh, ymk, wmw	Swahili
ta	tam	Tamil
te	tel	Telugu
tg	tgk	Tajik
th	tha	Thai
tl	tgl, fil	Tagalog
tr	tur	Turkish
tt	tat, sty	Tatar
uk	ukr	Ukrainian
ur	urd	Urdu
uz	uzb, uzn, uzs	Uzbek
vec		Venetian
vi	vie	Vietnamese
vo	vol	Volapük
wa	wln	Walloon
war		Waray-Waray
yi	yid, ydd, yih	Yiddish
yo	yor	Yoruba
zh	zho, chi	Chinese
zh-min-nan	nan	Min Nan
zh-yue	yyef, guzh	Cantonese

This list of supported languages consists of all languages for which, as of this writing, a localized Wikipedia with at least 10000 pages is available (see the List of Wikipedias), plus a small number of other languages. Note that the performance of the Wikifier for languages whose Wikipedia is small will be correspondingly worse due to the lower coverage of concepts as well as of inflected forms of words.