how's it spelt?

I have a friend who always text "sign..." and she really meant "sigh..." Well, that's a world of difference, don't you think?

Indeed, I am quite particular when it comes to proper spelling. Call it a habit, if you like.

For example, I've seen people using the word 'plague' when they really mean 'plaque' (this is for written text btw). Its not a typo either.

Plague
1) an epidemic disease that causes high mortality; pestilence.
2) an infectious, epidemic disease caused by a bacterium, Yersinia pestis, characterized by fever, chills, and prostration, transmitted to humans from rats by means of the bites of fleas.

Plaque
1) a thin, flat plate or tablet of metal, porcelain, etc., intended for ornament, as on a wall, or set in a piece of furniture.
2) an inscribed commemorative tablet, usually of metal placed on a building, monument, or the like.
3) Dentistry. a soft, sticky, whitish matlike film attached to tooth surfaces, formed largely by the growth of bacteria that colonize the teeth.