My pet peeve for many years has been with the 'rn' in small texts, especially with my smart phone. I felt that perhaps others may have the same peeve.
I decided to try and fix that with Atlantica. As you can see in poster No. 4.
"With the combination of 'rn' in small text it tends to appear as 'm'. Therefore it may be read as 's t e m' instead of 's t e r n'. Altalntica has an alternate 'rn'. By invoking the < Contextual-Alternate > feature. Atlantica will replace each 'rn' - or you may individually change them if you desire". Also note the deep cuts to help legibility for smaller texts.
This combination apparently does not appear in many words, but when it does it can suggest a different word as in; eastern, stern, tarnish, Tornado, Turn and in some names as well.