Country code for language. Use it in from field of json body.

it: Italian
en: English
fr: French
de: German
es: Spanish
ar: Arabic
zh: Chinese
ja: Japanese
pt: Portuguese
fi: Finnish
id: Indonesian
pl: Polish
nl: Dutch
sv: Swedish
tr: Turkish
ru: Russian
bg: Bulgarian
cs: Czech
da: Danish
et: Estonian
el: Greek
hu: Hungarian
lv: Latvian
lt: Lithuanian
ro: Romanian
uk: Ukrainian
ko: Korean
kk: Kazakh
az: Azerbaijani
uz: Uzbek