You can leverage Regex to create automatic aliasing within the the CMS. Below is a sample of how to create a regex aliasing rule that redirects to a specific language of the content when the en-AU/ value is entered into the URL of the site. This lets a user enter a specific language identifier, as opposed to adding the appropriate langtype value into the URL.
After adding this aliasing rule, enter the URL of SiteRoot/en-AU/TemplateName?id=x to resolve to content item with an Australian English language.
Expression Map: $1&langType=3081
Example URL: en-AU/contentblock.aspx?id=111