Usually the login in Contao is case-sensitive. But especially when using the email address of users as there username for the login this doesn't make sense. From a technical perspective it's understandable. But there are way to many users that type there email as they see

When using multiple languages with Contao on one domain you always define one fallback language which is used when you visit the website through the root url. If you've implemented a language switch with the changelanguage extension it won't work on the root page. That'