2650: Long S Mar 20, 2022

There is something called the long s ⟨ſ⟩, which people may be familiar with from printed documents before the 19th century especially. This is often confused with an ⟨f⟩ on first glance, but the two are unrelated. The long s, distinguished from the 'round s', dates back to Roman times at the time the upper & lower case letters were being distinguished, but before there were clear rules about them. The Greek sigma also is unique in the Greek alphabet for having three forms, and represents broadly the same sound, but that's not related. This was later formalized in German printing especially. After the start of the 18th century, it became phased out as it was harder for typists, required an extra letter in print types, and was not seen as providing enough benefit to account for the extra work. There will be more on the form & history of the long s in coming posts.

2559: Sigmatism Dec 15, 2021

Although many conditions and linguistic phenomena are named with a Greek letter plus '-cism', they aren't always named for the same reasons. 'Sigmatism', like 'lambdacism' describes a speech impediment that regularly affects one sound, in this case [s], though that can denote either the over- or underproduction of it. This can be an appropriate term to describe the effect of a lisp, though not necessarily.

2345: Digamma: Greek's Ghost Letter May 20, 2021

The letter G effectively replaced the letter Z in the Latin alphabet, but in the Greek alphabet the letter Ζ,ζ was also affected in its order in the alphabeta. The Hebrew and Phoenician letters, zayin, are both 7th and as numerals means (7) as is true in Greek numerals despite it being 6th in order. This is because the letter Ϛ,Ϝ known as Digamma which used to be 6th was used and eventually disfavored, merging with Sigma—namely the Lunate Sigma—creating the only Greek letter with 3 distinct forms (capital, lower case, and word-final). This had originally represented the sound /w/ which no longer exists in Greek.

2224: Lunate Sigma Jan 16, 2021

The Greek letter sigma is special in its design in a number of ways. It is the only to have 3 forms: Σ, σ, and ς (the last only found at the end of words), but even these are not the only way it's looked. The Lunate Sigma used in Greek of the Hellenistic period, was written in a C-like shape, now known as the Lunate Sigma (uppercase Ϲ, lowercase ϲ) called as such in reference to the Moon. This should not be confused for the Latin letter C/c. It only has two forms, laking the distinct word-final form that is found today. These days, it is mostly found in religious contexts or other decorative fonts.