Grammatik ran in 64K of RAM on a Z80 running CP/M. (The binary included a Forth interpreter so there was a lot of straight up code compaction.) So yeah, you could catch a lot of common English-language infelicities in a startlingly resource constrained environment... in 1983. Certainly a lot more than typos.

(The reason I remember this bright and shiny data point is I spent a week or three reverse engineering it and getting access to the inner interpreter; the office staff actually used it, though.)