Complex sentence: Southern speakers appear not to have the rounded vowel or the consonant, in line with north-south differences in Basque, and it is not clear if the northern distinction between and also exists in the south.
Split into simpler sentences: Southern speakers appear not to have the rounded vowel or the consonant, in line with north-south differences in Basque. It is not clear from the southern material if the northern distinction between and exists in the south.