I’ve been driven crazy a few times trying to figure out which code goes to which language so here it is for future reference:

Name localeValue
Bulgarian bg
Catalan ca
Chinese_China zh-CN
Chinese_Taiwan zh-TW
Croatian hr
Czech cs
Danish da
Dutch nl
English en
English_UnitedKingdom en-GB
Estonian et
Finnish fi
French fr
French_France fr-FR
German de
Hungarian hu
Italian it
Japanese ja
Korean ko
Malay ms
Norwegian no
Polish pl
Prtuguese_Brazil pt-BR
Romanian ro
Russian ru
Slovak sk
Spanish es
Swedish sv
Thai th
Turkish tr