Should I use ISO 3166 country codes (USA) or culture codes (en-US)?

Question

ISO 3166 contains a list of country codes with two characters, for example, US , UK , FR .

The shopping cart I used has both of these codes, as well as culture codes such as ru-US or ru-UK .

For a separate project, I thought that a longer code is more useful because it at least tells me the language used by this country. But I can not find the exact list of them.

Should I use these "culture codes" to keep track of countries or just stick to the ISO 3166 double-digit names? What could be the catch of use?

I'm not sure why a shopping basket that is locked in English will even take care of en-USA vs USA. Any insight?

Edit: Also, where can I get a list of culture codes? Is this an ISO standard? Is it right to assume that a country part of a culture code is an ISO 3166 country code?

Answer 1

Country codes are used to identify countries. Just a country.

Crop codes are used to identify crops to indicate their specifics, such as decimal places, date separators, currencies, etc. Here you are not directly interested in the country, but in a certain culture.

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Answer 2

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Answer 3

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Answer 4

, ISO 3166 - GB, ( " " ), DNS TLD (- , ). " " en-GB, en-UK.

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Answer 5

, (), (en-US). , / , . (pt-BR vs pt-PT), , (fr-CA en-CA).

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Answer 6

, , ISO.

If you also want to track user culture for presentation purposes (e.g., translations, date and number formatting), you must save both. Nothing should prevent a user living abroad from using his native language and culture settings. For example, French-speaking Canadians residing in the United States may have a US country code, but want to use the fr-CA culture code.