A couple of songs that are fairly easy to learn (repetitive). Not all of them are folk songs I think, but they kinda do fall into that category.

Also I notice a lot of these are Jacobite songs but then again, they are ballads and they are easy to do:


'The Skye Boat Song' - Either by Harold Boulton or Louis Stevenson
'Aikendrum'
'The Bonnie Banks of Loch Lomond'
'Fear a Bhata' - Gaelic song, but with English translation
'Flower of Scotland' - Roy Williamson (this is the national anthem)
'Cock of the North' - there are multiple versions
'Ye Jacobites By Name'
'The Bricklayer's Song'
'Cam Ye By Atholl'
'Rise, Rise'
'The White Cockade'
'The Bonnie Earl o Moray'
'By Yon Castle Wa' - Robert Burns
'Heigh Johnnie Cope are ye Wauking Yet?'
'The Massacre of Glencoe'
'Oro Se Do Beatha Bhaile' - an Irish Gaelic song but not difficult
'Amhran na Bhfiann' - Irish Republic's anthem also in Irish language
'Men of Harlech' - Welsh song but with many versions
'The Song of Roland' - usually sung in Norwegian or Swedish
'Roses of Prince Charlie' - By the Corries again
'Twa Recruiting Sergeants'
'Wild Mountain Thyme'
'Lord of the Dance'
'Dark Lochnagar' - a Byron poem set to music
'Scotland the Brave'
'Danny Boy' - An Irish song that is similar to:
'Red is the Rose'
'Londonderry Air'