Style: Greek: document rationale for design of PERISPOMENI accent (tilde vs. inverted breve)

Reported by Simos Xenitellis on 2010-09-23
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Ubuntu Font Family

Bug Description

Rendered in 24pt Regular

Sample Glyphs:


(I capitalise PERISPOMENI, as it is a convention in Unicode. I am not shouting :-).
(I mentioned the following issue to Bruno already at
so I am just creating the report for completeness).

From the Greek Extended Unicode block -
letters that have PERISPOMENI (tilde character over the main letter) are shown to have an inverted breve (upside down cup).

The inverted breve is found in some fonts, however it is not common at all in Greece and Greek.

The sample font at shows correctly PERISPOMENI (tilde)
All Greek fonts such as those from the Greek Font Society ( use tilde for PERISPOMENI.

You can try out the GFS fonts in Ubuntu with

sudo apt-get install ttf-gfs-artemisia ttf-gfs-baskerville ttf-gfs-bodoni-classic ttf-gfs-complutum ttf-gfs-didot ttf-gfs-didot-classic ttf-gfs-gazis ttf-gfs-neohellenic ttf-gfs-olga ttf-gfs-porson ttf-gfs-solomos ttf-gfs-theokritos

See also screenshots at
(they compare between DejaVu Sans and Ubuntu Font Beta).

UA String:

Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100716 Ubuntu/10.04 (lucid) Firefox/3.6.7

Paul Sladen (sladen) wrote :

While hunting around for the background on this, I found:

which gives a reasonable overview; in short, yes, there are two variants of drawing the perispomeni accent; either as a variable tilde, or as a invert breve. The determining glyph is '῀' (U+1FCO) which is used as a component for the rest.

tags: added: ttf-diacritical ttf-greek ttf-style
tags: added: tff-document-rationale
summary: - [Greek] PERISPOMENI accent should look like tilde, not inverted breve
+ Style: Greek: document rationale for design of PERISPOMENI accent (tilde
+ vs. inverted breve)
Changed in ubuntu-font-family:
importance: Undecided → Low
status: New → Confirmed
milestone: none → 1.00

Indeed there are more than one styles in the representation of PERISPOMENH for Greek Polytonic. Which shall we choose?

Greek students are taught Ancient Greek (in Greek Polytonic) in high school and senior high school (ages 12 to 18). The school books for high school are freely available as PDF files from (search for «Αρχαία» to find all
relevant books) For example, (ages 13-14). You can also download the entire dictionary, students currently use:

All Greek students go through high school, as it is part of the compulsory education, and they end up seeing this type of Greek Polytonic.

In addition, the default installation of Ubuntu with the Greek locale (language support) allows users to type Greek Polytonic (we made it part of the default keyboard layout). Thus, students can write their school essays on Ubuntu with Ubuntu font, in Greek Polytonic.

Therefore, we, as Ubuntu-gr community, believe that we should go for the style 'tilde' for PERISPOMENI, since it is used in Greek education, and specifically during all (compulsory) secondary education.

A screen shot of the aforementioned dictionary

To post a comment you must log in.
This report contains Public information  Edit
Everyone can see this information.

Other bug subscribers