Language | Local code |
English (UK) | en-GB |
English (US) | en |
German | de |
Spanish | es |
Catalan | ca-ES |
French | fr |
French (Canada) | fr-CA |
Italian | it |
Russian | ru |
Chinese (Traditional) | zh-Hant |
Chinese (Simplified) | zh-Hans |
Turkish | tr |
Dutch | nl |
Danish | da |
Portuguese (Portugal) | pt-PT |
Japanese | ja |
Swedish | sv |
Polish | pl |
Arabic | ar |
Hebrew | he |
Afrikaans | af |
Czech | cz |
Bulgarian | bg |
Finnish | fi |
Greek | el |
Hungarian | hu |
Indonesian | id |
Norwegian (Bokmal) | nb |
Romanian | ro |
Thai | th |
Ukrainian | uk |
Vietnamese | vi |
Urdu | ur |
Hindi | hi |
Telugu | te |
Kannada | kn |
Tamil | ta |
Marathi | mr |
Korean | ko |
Persian | fa |
Bengali | bn |
Gujarati | gu |
Malay | ms |
Malayalam | ml |
Slovak | sk |
Croatian | hr |
Slovenian | sl |
Kazakh | kk |
Icelandic | is |

Language | Local code |
English | en |
German | de |
Spanish | es |
French | fr |
Italian | it |
Russian | ru |
Chinese (Traditional) | zh-Hant |
Chinese (Simplified) | zh-Hans |
Turkish | tr |
Dutch | nl |
Danish | da |
Portuguese (Portugal) | pt-PT |
Japanese | ja |
To add any of the other 36 languages to your app, follow the following steps:
1. Download the strings bundle.
2. Remove the lproj files of the languages not required for your app.
3. Finally, add the bundle to your project.

Refer here for more details: resConfigs key