Pronunciation of Vowels in Saterfrisian
Dr. Fort's Spelling

 

Saterfrisian has a four-step system of shorts:
ie           uu    
  i       u      
      o        
      a            

 

and of longs:
e           u     '
  ee       oo      
      oa        
      aa            

 

as well as the diphthongs ending in i:
                 
                 
    i   oi oai   i  
      ai          

 

and the diphthongs ending in u, uw:
ieuw                  
  eeuw                
    uw   ou          
      au            

The difference between ie and e respectively uu and u as well as and ' only applies for e few words.