since there are a few German speakers here and also asked about the South German dialects, here is another suggestion (purely subjective perception)
line 1: por liber umen ? nuester? - for ?our? freedom amen
line 2: anchion o la dabad - locked or anchored in (or only in) a tabard (the medival garment)
cere portad - closed doors
line 3: Six + manx /mamx+ monx /momx (maybe for monk) - six monks
rix + abria oder abra/abia + ma + ma - king open me me
line 4: paldin ubrey so nim gas mich o - paladin aubrey = noble, ruler, so take it and let me
The reason why I think that the authors here demand their freedom in exchange for the book is the text on page f17r. If you read this text in Swiss German, you can translate it with similar content as follows:
Malhor allor, lueg her un llan mi otmol nus/nuf
bad times/misfortune at this place, look at me and let me go out
line 1: por liber umen ? nuester? - for ?our? freedom amen
line 2: anchion o la dabad - locked or anchored in (or only in) a tabard (the medival garment)
cere portad - closed doors
line 3: Six + manx /mamx+ monx /momx (maybe for monk) - six monks
rix + abria oder abra/abia + ma + ma - king open me me
line 4: paldin ubrey so nim gas mich o - paladin aubrey = noble, ruler, so take it and let me
The reason why I think that the authors here demand their freedom in exchange for the book is the text on page f17r. If you read this text in Swiss German, you can translate it with similar content as follows:
Malhor allor, lueg her un llan mi otmol nus/nuf
bad times/misfortune at this place, look at me and let me go out