If you want to set the folder names of the IMAP storage to your local language, you can choose between these available languages. Please note, that the only reason to do so is for compatibility with Microsoft Outlook. It is considered a bad idea to set this, since it makes changing languages impossible. So do not set this unless you have to.
Wannear jo de mapnammen fan de IMAP- opslach yn jo eiegen taal wolle ha, dan kinne jo kieze út de beskikbere talen. De inichste reden wêrom dat dien wurdt is om komptabel te wêzen mei Microsoft Outlook. It is gjin goed idee om dit te dwaan omdat it dan ûnmooglik is om fan taal te feroarjen. Jo moatte dizze opsje allinne mar oansette as it wier nedich is.