TCF is France's numeric-scale French proficiency test, structurally distinct from its lifetime-diploma siblings DELF and DALF because it reports a continuous score per module rather than a fixed-level certificate, and it exists in several purpose-built variants — most notably TCF Canada, built specifically for Canadian immigration and converted into the NCLC scale that Immigration, Refugees and Citizenship Canada actually uses for Express Entry and other pathways. Three modules (Listening, Grammar/Structures, Reading) are mandatory for every sitting, while Writing and Speaking are optional add-ons required only when a candidate's specific purpose demands them, meaning the actual test a candidate sits varies more by intended use than most standardized language exams. Because Express Entry allocates additional points for higher NCLC bands, many TCF Canada candidates retake strategically to cross a specific threshold rather than treating any passing result as sufficient — a use case with no real equivalent among fixed-diploma exams like DELF. Results are also generally only considered valid for about two years for most official purposes, so candidates need to time their test date around their actual application timeline rather than assuming an older result remains indefinitely usable.