The Lead Instructor of a Concordia Language Villages CLV Language Training Center (LTC) program is responsible for the development and implementation of a language-specific two- and three-week-long residential iso-immersion program in accordance with client-specified expectations. Note: We often develop customized language programs for our partners and have offered or proposed programs in languages such as Dari, Croatian, Hebrew, Norwegian, Pashto, Portuguese, Ukrainian, and Urdu.