Multiple language inputs may be provided to various applications programs and/or threads in a computer system. Such inputs may be directed to various software systems on the computer for further processing, wherein the software systems provide language-specific processing. Each application program and/or thread within an application program accessible by the computer may have a different selected input language. More specifically, systems, methods, and computer-readable media for this process may include: (a) determining an input language for a first application program accepting input through a computer; and (b) selecting at least one software system capable of accepting or operating on at least some of the input based, at least in part, on the input language determined for the first application program. In some examples, the input language of various software systems on the computer may be tied to the input language of another software system, such as the soft keyboard.