“…However, sometimes L2 teachers in foreign language settings are reluctant to let their students work in pairs or small groups because they feel they are going to make use of their shared first language (L1) (Tognini & Oliver, 2012). Although a balanced use of the L1, that is, one in which the teacher strategically uses it to facilitate interaction in the classroom, has been shown to have positive effects for subsequent L2 learning (Alegría de la Colina & García Mayo, 2009;Azkarai & García Mayo, 2015;DiCamilla & Antón, 2012;Scott & de la Fuente, 2008;Storch & Aldosari, 2010;Swain & Lapkin, 2000;Tognini & Oliver, 2012), most studies that have explored what role the L1 plays have mainly focused on adult populations, and research with children is notably scarce (Butler, 2015;Shintani, 2012Shintani, , 2014Tognini & Oliver, 2012). Research on child interaction in English as a second language (ESL) was limited until pioneering work by Oliver (1995Oliver ( , 1998.…”