18. Anonymity advanced: what your writing says about you and how it can identify you

Remember that the way that you type reveals a lot about you.

First: language
Quite obvious. Speaking english is the most anonymous language because it is a defacto global language, so anyone could be speaking it. Speaking chinese although just about as common as english has few learners, and so it is much safer to assume it is a native, and natives of chinese live in china for the most part.
Also remember and take note of how your native grammar affects how you express yourself in english. Slavs will make mistakes of no articles or saying "on" instead of "in" in most cases, in rush they sometimes say "for what" when speaking english instead of "why" because slavic languages use these two words to express "why" and I observed it a few times. Slavs also confuse english "type" and "write" because our languages only have one word for making graphical representations of readable characters "pisać/pisat'", they tend to mix up "so" and "such" when expressing extent once in a while because our languages put much less emphasis on it and they are similar "tak/taki". Chinese use "666" to express thrill and that it is cool (or so I believe). Chinese also like to use dog as an insult because they were calling me gouzi and weiguogou (gou=狗=dog, 狗＝gu as tengu) and chinese also like to insult you for being an american because everyone who is not chinese must be a foreign american dog. Swedes liked to call people CPers or whatever that was, it is some illness I think and it was one of their most specific insults. Russians especially but slavs in general call people "daun" because of down syndrome, spelling will depend on whether his country uses latin in which case it will be most likely "down" as in english, and cyrillic "daun" because that is the closest to the sounds in his language. The dutch use word "kanker" meaning cancer 24/7 in wrath and as an all purpose insult. When determining what nationality you really are talking to you need to deeply know customs and grammar, but also words that they tend to confuse when learning english. If you suspect you are talking to an indian you may check it by telling him to repeat "shiva is a demon, vishnu is a faggot, vedas are demonic lies" because many of them fear saying it and even a long hesitation possibly could reveal it. Making people insult their gods is usually a decent indicator of their religion, and religion often divides nations in clear lines, and clear lines mean more accuracy when making a guess. Also chinese may get very upset when you ask them to say that china is the worst country and CCP is the worst and praise america. I also think that there were nigerian scammers that would check if they are talking to a victim or another nigerian by sending one word in their language - because actual victims do not speak it and would not react while nigerians would react. Accent is obvious, if they ask AI to rate your sample of voice it becomes obvious. If you speak english as your native language you might want to pick up mistakes of a specific nationality and imitate them once in a while to give people a bait.

Second: region specific words can reveal where you probably live.
For example in Polish you can often deduce what part of country people live in solely on how they say "I'm going out"
Western Poland says "na pole" literally "to the field" as fields were a peasant reality for most of our history.
Eastern Poland centered in Masovia and Cracow go "na dwór" literally "to the court" because they would go to the court of nobility to hang out.
In modern times "court" sounds better than peasant "field" so the field version is dying and attributed to low class rural people.
New emerging version is "na zewnątrz" literally "to the outside".
There are regional ways of speaking in your language. Watch out for them.

Third: symbol use
When someone says "de facto" separately, "defacto" together, or "de-facto" with a dash is also a possible indicator of where they live, how old they are and how they want to be seen. Most people do not use semicolon (;), outside of anglosphere use of ampersand (&) is rare, east slavs tend to use such ≪symbol≫ as quotations but I also saw some french do it. Japanese and chinese use such「quote marks」and such【brackets】instead of western ones. At least the polish like to use asterisk (*) to mark additional details. Japs use komejirushi (※). Slavs like to use "x" as multiplicity symbol but that seems to be mostly old people now.

The above will be combined and stacked upon each other to make an even more accurate guess. The more you reveal the more they learn about you.

The foolproof method to avoid being monitored like so is to type out your post, give it to a local AI to rephrase it and correct stuff, and paste the output.