Dialectal divergences are observable between the northern and southern forms of Galician-Portuguese in 13th-century texts but the two dialects were similar enough to maintain a high level of cultural unity until the middle of the 14th century, producing the medieval Galician-Portuguese lyric.
As diverxencias dialectais son observables entre as formas do norte e do sur do galaico-portugués en textos do século XIII, mais as dúas variedades eran semellantes abondo para manter un alto grao de unidade até mediados do século XIV, coa literatura galego-portuguesa medieval.