font: wrong language is used for sample text

[changwoo]

I found with Korean fonts, "bg" seems to be chosen as the language for sample text. I think it's because "bg" is alphabetically first in the supported language list.

$ fc-query /usr/share/fonts/truetype/baekmuk/batang.ttf |grep lang
	familylang: "en"(s)
	stylelang: "en"(s)
	fullnamelang: "en"(s)
	lang: bg|fj|ho|ia|ie|io|ko|kum|nr|om|os|ru|sel|so|ss|st|sw|ts|uz|xh|zu|kj|kwm|lg|ms|ng|rn|rw|sn|za(s)
$ 

Fonts don't seem to have information to finding out their representitive language. So how about just putting language for sample text in metainfo file?

[ximion]

Yeah, font metadata is hard.
What you can do at the moment is use two custom values to set the exact text and icon to be used, this is primarily used for symbolic fonts though:

<custom>
  <value key="FontIconText">∑√</value>
  <value key="FontSampleText">∑ ∮ √ ‖...‖ ⊕ 𝔼 ℕ ⋉</value>
</custom>

To explicitly set the supported languages for a font, you should be able to use <languages/> in your font metainfo file, see https://www.freedesktop.org/software/appstream/docs/chap-CollectionData.html#tag-ct-languages for details.
That support isn't implemented yet however, maybe I will be able to work on that this week (as always though, patches welcome!).

[ximion]

I've committed a preliminary patch that deals with this issue. I have an idea for a slightly better version though, which will be added later.
Greetings from Debconf! :-)