This brings back fond memories from the 8-bit era. Tasword II was a text processor for the Sinclair ZX Spectrum where the developers resorted to extra-narrow fonts to cope with the Speccy's very limited (256x192) screen resolution.
The lower screenshot in [1] provides a glimpse of what seems to be a 3px wide font.
OP's 2px width are a bit too extreme for my taste though.
[1] https://spectrumcomputing.co.uk/entry/4000080/Timex/Tasword_...