If you have & Windows; on your machine, you can use the TTF fonts from & Windows; (Arial is in those) via & systemsettings; -gt; Computer Administration -gt; Font Installer and add the & Windows; Font folder.
Se tes & Windows; podes utilizar as fontes TTS do & Windows; (Arial está entre elas) en & systemsettings; - gt; Administración do computador - gt; Instalador de fontes e engadir o cartafol das fontes do & Windows;.