This package provides tools for typesetting multilingual lecture notes, exercise sheets, and general-purpose documents. Each language is specified via its corresponding babel identifier and is associated with a declaration, macro, and environment used to delimit content written in that language. Arbitrary combinations of languages can be loaded in a single document to support both monolingual and multilingual output. The package also defines macros and environments for typesetting lecture notes and exercise sheets, including configurable inclusion of elements such as proofs, solutions, and sketchboxes.