添加语言包时候出现这个错误，请帮忙，谢谢！
Magento2.3.5也试了一下，相同的问题！
[ec2-user@ip-172-16-2-116 magento]$ sudo php bin/magento setup:static-content:deploy -f my_MM
In InputValidator.php line 152:
my_MM argument has invalid value, please run info:language:list for list of available locales
setup:static-content:deploy [-f|--force] [-s|--strategy [STRATEGY]] [-a|--area [AREA]] [--exclude-area [EXCLUDE-AREA]] [-t|--theme [THEME]] [--exclude-theme [EXCLUDE-THEME]] [-l|--language [LANGUAGE]] [--exclude-language [EXCLUDE-LANGUAGE]] [-j|--jobs [JOBS]] [--max-execution-time [MAX-EXECUTION-TIME]] [--symlink-locale] [--content-version CONTENT-VERSION] [--refresh-content-version-only] [--no-javascript] [--no-js-bundle] [--no-css] [--no-less] [--no-images] [--no-fonts] [--no-html] [--no-misc] [--no-html-minify] [--] [<languages>...]
