We present a summary of QALB-2015, the second shared task on automatic text correction of Arabic texts. The shared task extends QALB-2014, which focused on correcting errors in Arabic texts produced by native speakers of Arabic. The competition this year, in addition to native data, includes texts produced by learners of Arabic as a foreign language. The report includes an overview of the QALB corpus, which is the dataset used for training and evaluation, an overview of participating systems, results of the competition and an analysis of the results and systems.