Complex sentence: Local authorities in Scotland are unitary in nature but not in name; there are 32 "Councils", one of which (Comhairle nan Eilean Siar, formerly the Western Isles Council) has elected for the legal option of using the Gaelic designation "Comhairle".
Split into simpler sentences: Local authorities in Scotland are unitary in nature but not in name. There are 32 Councils, one of which (Comhairle nan Eilean Siar, formerly the Western Isles Council) has elected use the Gaelic designation "Comhairle".