A parallel corpus for detecting and converting between Portuguese orthographies. Each record is one Portuguese sentence written in five orthographic norms, so the same content can be aligned across the spelling reforms of the language.

	Norms (one column each)

column norm

etymological pre-1911 pseudo-etymological spelling

pt_1973 pre-AO1990 European (Convenção 1945 + 1973 mini-reform)

ao1990_pt Acordo… See the full description on the dataset page: https://huggingface.co/datasets/TigreGotico/desacordo_ortografico.