From the 11th century all Aragonese documents were written in Latin with Romance features, but it is not until the second part of the 13th century that there is generalization of the use of Aragonese language in all documents, a later date than in Castile or Occitania.
From the 15th century there developed a special singularity in this language literature: Aljamiado in which Aragonese features could stand Spanish influence until their disappearance in 1610.