Open Sans (and some others, like Roboto) are advertised as they supporting Extended Greek, but choosing the greek-ext subset will not display Open Sans (or the required font) for this range because they don't actually contain the required characters. You're welcome to commission these characters, though.
The previous fonts Mercurial repository had a wiki at https://code.google.com/p/googlefontdirectory/wiki which is no longer available. The contents of the wiki are now available here:
https://github.com/googlefonts/gf-docs
There are some similarly named pairs of directories which each have identically named font files. These files are redundant, and exist following the renaming of a family. The initial directories are kept so that people already using that initial name can continue to do so. They are no longer listed in the main www.google.com/fonts directory, but the files exist in this repo since they are still served via the Google Fonts API.
ofl/alefhebrew
and ofl/alef
contain Alef-Regular.ttf
and Alef-Bold.ttf
ofl/mrbedford
and ofl/mrbedfort
contain MrBedfort-Regular.ttf
ofl/mrssaintdelafield
and ofl/misssaintdelafield
contain MrsSaintDelafield-Regular.ttf
ofl/siamreap
and ofl/siemreap
contain Siemreap.ttf
ofl/terminaldosis
and ofl/dosis
contain the same files (renamed) and ofl/terminaldosislight
contain TerminalDosis-Light.ttf
Fonts in Early Access do not have METADATA.pb files.
While .textproto
is now the canonical extension for protobuffers text files, we have hundreds of METADATA
files with the .pb
extension.
The inconsistency isn't a practical issue, and as we have internal tools that assume the old filenames, it isn't worth renaming them proactively.
You can install all of the fonts using Windows PowerShell. Change directories to the folder where you downloaded the package, and run the following command:
$fonts = (New-Object -ComObject Shell.Application).Namespace(0x14)
dir ofl/*/*.ttf | %{ $fonts.CopyHere($_.fullname) }
The www.google.com/fonts directory is accompanied by a Google Fonts Developer API which provides raw data for constructing such a directory in JSON format. Here is a list of 3rd party directories:
There are also handcrafted directories with rich samples:
This shell command shows all email addresses for font copyright holders listed in the METADATA.pb files:
grep copyright\: */*/MET* | grep \@ | perl -ne'if(/[\w\.\-\_]+@([\w\-\_]+\.)+[A-Za-z]{2,4}/g){print "$&\n"}' | sort | uniq
This shell command shows all the families without a contact email address:
grep copyright\: */*/MET* | grep -v \@ | cut -d\: -f1 | cut -d\/ -f2 | uniq | sort
The copyright holders of those families are mostly Google, SIL, Adobe, Canonical, Naver, and a couple of outliers.
Some interesting articles about Google Fonts:
Here is a list of some libre fonts made for special purposes (emoij, math, icon, etc) that are not available in Google Fonts.