This issue appears mostly in Docker containers after initial build. If you try to run
bin/magento setup:static-content:deploy you will get an error like this:
Argument has invalid value, please run info:language:list for list of available locale
The list of possible locales in Magento 2 is driven by options provided by ICU library/package. The ICU project homepage is https://icu.unicode.org/.
If you run your environment based on Alpine Linux, you will need to install
icu packages. This will provide the necessary locales.
apk add icu-dev icu-libs icu-data-full
After that, you can run
bin/magento setup:static-content:deploy and it should work.