Peul
The linguistic research of Diop and his school have been criticised by Henry Tourneux, a linguist specialising in the Fula language. Tourneux notes that Diop accused previous linguists of being unscientific and obscuring the truth. Tourneux's main criticisms are that many words in the lists used to make comparisons may have been loaned from unrelated languages (including modern Arabic), many of the claimed resemblances are far-fetched and that, when Diop transliterated Wolof words on the principles applied to Ancient Egyptian writings, he distorted them.