This mod disables forced capitalisation of most menu elements in PAYDAY 2. It also corrects capitalisation of strings that are either all-caps by default or are not capitalised at all. Some strings are not affected; such as the button names in the Crime.net sidebar, the "LOADING" text in loading screens, and the words "CRIME.NET", "OVERKILL", and "PAYDAY 2".
This mod wouldn't have been possible without the help of Cpone.