Abstract: A multi-lingual toggle (“MLT”) system with transferable skills, course mapping and tranlanguaging capabilities across educational content from different regional and global jurisdictions is disclosed. The MLT system tracks student holistic and longitudinal growth towards developing a multiliterate brain and supports literacy education in multiple languages. The MLT system includes learning progression routines developed authentically to reflect literacy acquisition in the target language. The learning progressions are empirically validated through the application of an item response theory (“IRT”) psychometric model to compute the difficulty of the skills associated with the learning progressions. There is a strong relationship between the ordering of the skills and the associated difficulties that presents an opportunity to create multilingual literacy trajectories that highlight how multilingual students achieve multiliteracy holistically, rather than in a monolingual sense.