The source unpacked is ~950MB, so to save on build space, this SlackBuild script
extracts, builds, and removes source for each language package one at a time.

Any number of packages can be built - set by the I18N variable

Languages are identified as:

af
Afrikaans

ar
Arabic

az
Azerbaijani

be
Belarusian

bg
Bulgarian

bn
Bengali

br
Brezhoneg

bs
Bosanski

ca
Catalan

cs
Czech

csb
Kashubian

cy
Cymraeg

da
Danish

de
Deutsch

el
Greek

en_GB
British English

eo
Esperanto

es
Spanish

et
Estonian

eu
Basque

fa
Persian

fi
Finnish

fr
French

fy
Frisian

ga
Irish

gl
Galician

he
Hebrew

hi
Hindi

hr
Croatian

hu
Hungarian

is
Icelandic

it
Italian

ja
Japanese

kk
Kazakh

km
Khmer

ko
Korean

lt
Lithuanian

lv
Latvian

mk
Macedonian

mn
Mongolian

ms
Malay

nb
Norwegian Bokmal

nds
Low Saxon

nl
Dutch

nn
Norwegian Nynorsk

pa
Punjabi

pl
Polish

pt
Portuguese

pt_BR
Brazilian Portuguese

ro
Romanian

ru
Russian

rw
Kinyarwanda

se
Northern Saami

sk
Slovak

sl
Slovenian

sr
Serbian

sr@Latn
Serbian

ss
Siswati

sv
Svenska

ta
Tamil

te
Telugu

tg
Tajik

th
Thai

tr
Turkish

uk
Ukrainian

uz
Uzbek

uz@cyrillic
Uzbek

vi
Vietnamese

wa
Walloon

zh_CN
Simplified Chinese

zh_TW
Traditional Chinese