Pires and Rothman (2009) claim that due to their "inborn faculty of language," children automatically acquire the grammar found in their input.[1] Therefore, in conclusion, it is not a deficient ability to acquire the language, but rather, the absence of, or limited access to, certain properties in the child's input that leads to errors in language production.[10] Without access to a standard dialect of the target language often found in formal academic contexts, heritage language learners continue to make these production errors.