Spanish (Latin America) locale code

Hello!

I am developing an Android Unity game and using I2 plugin for language localization.

For Spanish, I planned to support both Spanish (Spain) and Spanish (Latin America).

Here are the links:
Android Locale
IANA Language Subtag Registry

When it comes to Spanish (Latin America), I2 uses es-US in GoogleLanguages.cs, but Android uses es-419.

I also did some google and found that es-US is used for Spanish (United States) but not Spanish (Latin America).
Check this link: https://docs.microsoft.com/en-us/openspecs/office_standards/ms-oe376/6c085406-a698-4e12-9d4d-c3b0ee3dbc4a

I am not sure what specification I2 plugin uses. Any clarification would be appreciated.

Thanks!