It's usually called "Natural Linen" you can always check the tag it should say 100% Unbleached cotton!
Cloth made from unbleached fiber is usually called "raw."
Ecru
ecru
ECRU
CALICO
Do you mean écru ? It is a colour, the colour of pale greyish yellowish unbleached linen. It comes from the French word for "raw"
bleach is 'la javel' (fem.) or ' l'eau de javel ' in French. The fabric or linen that do not accept bleach are market on their label with a symbol 'do not bleach', that the French read as 'ne pas javelliser' (verb) or 'pas de javel'. So unbleached linen would be 'du linge qui n'a pas été javellisé', but that's a bit clumsy as a sentence.
Ancient Egyptians used a material called linen.
Cloth manufactured of a blend of wool and linen would be called a wool-linen blend, usually with the percentage mix of each fibre indicated on the label.
voile
Alb.
bed linen are called 'les draps' (properly 'the sheets') in French.