How to stop VS Code from autocompleting plain text to god knows what

Make a language-specific setting like this (in your settings.json):

"[plaintext]": { "editor.quickSuggestions": { "other": false, "comments": false, "strings": false } }

This goes inside the bracket already in that file. Also to get to JSON mode you have to first click a little icon at the top right.

Source: https://stackoverflow.com/questions/71049196/how-can-i-turn-off-auto-complete-for-txt-files-in-vs-code