...that's "spelling."    "Grammar" is the whole system and structure of a language-- which SJW's want inculcated with false terms to accommodate the fantasy of an infinitely small part of the population.  What's more- many of that "group" suffering from the mental illness don't want the made-up terms used, either, as shown by Dr. Jordan Peterson from the University of Toronto.
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His YouTube channel and classroom discussions are well worth watching, and he was inadvertently thrust to the forefront of Canada's asinine legislation, which mandates at the end of a gun that you use other's made-up terms for themselves or be jailed and fined.  It is absolutely terrifying what Leftist countries are doing to the supposed-free speech of its citizens.