Add "lowercase" to language and country checks
Add "lowercase" to language and country checks

This is to ensure people will use lowercase ISO codes ("pl", "fr",
etc.)

swcarpentry/amy,pbanaszkiewicz/amy,wking/swc-amy,wking/swc-amy,wking/swc-amy,swcarpentry/amy,vahtras/amy,pbanaszkiewicz/amy,swcarpentry/amy,pbanaszkiewicz/amy,vahtras/amy,vahtras/amy,wking/swc-amy