Detailed introduction of Android language abbreviations and abbreviations

android resource folder rules:
Language abbreviations - national and regional abbreviations
Please refer to:
National area abbreviation
en English
en_US English (USA)
ar Arabic
ar_AE Arabic (united Arab emirates)
ar_BH Arabic (bahrain)
ar_DZ Arabic (Algeria)
ar_EG Arabic (Egypt)
ar_IQ Arabic (Iraq)
ar_JO Arabic (Jordan)
ar_KW Arabic (Kuwait)
ar_LB Arabic (Lebanon)
ar_LY Arabic (Libya)
ar_MA Arabic (Morocco)
ar_OM Arabic (Oman)
ar_QA Arabic (Qatar)
ar_SA Arabic (Saudi Arabia)
ar_SD Arabic (Sudan)
ar_SY Arabic (Syria)
ar_TN Arabic (Tunisia)
ar_YE Arabic (yemen)
be belarusian
be_BY belarusian (belarus)
bg Bulgarian
bg_BG Bulgarian (Bulgaria)
ca Catalan
ca_ES Catalan (Spanish)
Catalan (ca_ES_EURO)
cs Czech
cs_CZ Czech (Czech republic)
da Danish
da_DK Danish (Denmark)
de German
de_AT German (Austria)
de_AT_EURO
de_CH (Switzerland)
de_DE
de_DE_EURO
de_LU German (Luxembourg)
de_LU_EURO German (Luxembourg, Euro)
el Greek
el_GR Greek (Greek)
en_AU English (Australia)
en_CA English (Canada)
en_GB English (UK)
en_IE English (Ireland)
en_IE_EURO English (Ireland, Euro)
en_NZ English (New Zealand)
en_ZA English (South Africa)
es Spanish
es_BO Spanish (Bolivia)
es_AR Spanish (Argentina)
es_CL Spanish (Chile)
es_CO Spanish (Colombia)
es_CR Spanish (costa rica)
es_DO Spanish (Dominican republic)
es_EC Spanish (Ecuador)
es_ES
es_ES_EURO
es_GT Spanish (Guatemala)
es_HN Spanish (Honduras)
es_MX Spanish (Mexico)
es_NI Spanish (Nicaragua)
et Estonian
es_PA Spanish (panama)
es_PE Spanish (Peru)
es_PR Spanish (Puerto Rico)
es_PY Spanish (Paraguay)
es_SV Spanish (el Salvador)
es_UY Spanish (Uruguay)
es_VE Spanish (venezuela)
et_EE Estonian (Estonia)
fi in Finnish
fi_FI Finnish (Finland)
fi_FI_EURO Finnish (Finland, Euro)
fr French
fr_BE French (Belgium)
fr_BE_EURO French (Belgium, Euro)
fr_CA French (Canada)
fr_CH French (Switzerland)
fr_FR French (France)
fr_FR_EURO French (France, Euro)
fr_LU French (Luxembourg)
fr_LU_EURO French (Luxembourg, Euro)
hr Croatian
hr_HR Croatian (Croatia)
hu Hungarian
hu_HU Hungarian (Hungarian)
is is
is_IS Icelandic (Iceland)
it Italian
it_CH Italian (Switzerland)
it_IT Italian (Italy)
it_IT_EURO Italian (Italy, Euro)
iw Hebrew
iw_IL Hebrew (Israel)
ja Japanese
ja_JP Japanese (Japan)
ko Korean alphabet
ko_KR Korean (South Korea)
lt Lithuanian
lt_LT Lithuanian (Lithuania)
lv latvian (litto)
lv_LV latvian (litto) (Latvia)
mk Macedonian
mk_MK Macedonian (kingdom of Macedonia)
nl Dutch
nl_BE Dutch (Belgium)
nl_BE_EURO Dutch (Belgium, Euro)
nl_NL Dutch (Netherlands)
nl_NL_EURO Dutch (Netherlands, Euro)
no Norwegian
no_NO Norwegian (Norway)
no_NO_NY Norwegian (Norway, Nynorsk)
pl polish
pl_PL polish (Poland)
pt Portuguese
pt_BR Portuguese (Brazil)
pt_PT
pt_PT_EURO Portuguese (Portugal, Euro)
ro romanian
ro_RO romanian
ru ru
ru_RU Russian
sh sebonis - Croatian
sh_YU seponis - Croatian (Yugoslavia)
sk slovak
sk_SK slovak
sl slovenian
sl_SI slovenian (Slovenia)
sq Albanian
sq_AL Albanian (Albania)
sr Serbian
sr_YU Serbian (Yugoslavia)
sv swe
sv_SE Swedish (Sweden)
th Thai
th_TH (Thailand)
tr Turkish
tr_TR Turkish (Turkey)
uk Ukrainian
uk_UA
zh Chinese
zh_CN Chinese (China)
zh_HK Chinese (Hong Kong)
zh_TW Chinese (Taiwan)