Because of recent immigration, Italy has sizeable populations whose native language is not Italian, nor a regional language. According to the Italian National Institute of Statistics, Romanian is the most common mother tongue among foreign residents in Italy: almost 800,000 people speak Romanian as their first language (21.9% of the foreign residents aged 6 and over). Other prevalent mother tongues are Arabic (spoken by over 475,000 people; 13.1% of foreign residents), Albanian (380,000 people) and Spanish (255,000 people).