Two precise goals were targeted in this research: 1) Describing the orthographical knowledge of the student with a DLD (Developmental Language Disorder) and 2) identify if the written word production results are related to other tests using orthographical knowledge such as word/pseudoword recognition. A group comparative methodological approach was used in this study in order to analyze the results of three groups of participants of the study sample: 1) An experimental group including students with severe DLD (TDL, n = 25, M age = 9.72); 2) a controlled group matched according to reading skill level (CL, n = 26, M age = 8.22); and 3) a controlled group matched according to chronological age (CA, n = 42, M age = 9.82). This exploratory study’s results suggest that the performances in orthographical production of students who have a DLD are similar to those of the younger students (CL). Lastly, significant correlation links between the performance of reading and production word tasks were identified in the three groups of participants.