Wild guess: Change https://git.gnome.org/browse/gnome-mahjongg/tree/data/org.gnome.gnome-mahjongg.gschema.xml.in#n13
to <_default>Easy</_default>?

Created attachment 254240 [details] [review]
Mark "Easy" string as translatable

No. It's unfortunately more complicated.

"Easy" is missing in data/translatable_game_names.h It's easy add line:
NC_("mahjongg map name", "Easy")

But application stores current map in dconf as translated name. It's stupid.
- default value is Easy and if you have non-English locale, this value is invalid
- if you change your locale, current value becomes invalid
Schema should store English names.

Created attachment 254247 [details] [review]
Mark Easy map name as translatable

We additionally need to store only the untranslated name in gsettings,
as we do with the non-builtin maps.

Marek, can you sanity-check this for me please?  I'm not familiar with the process for adding new string translations, so I haven't tested to make sure this actually works.

Testing: Apply the patch, go to /po, run "intltool-update -p", open the .pot file to see if the string is included. 
With regard to merging the patch into the codebase: Merging "forgotten" strings only requires announcing to gnome-i18n@, see https://wiki.gnome.org/TranslationProject/HandlingStringFreezes

Right; we also needed to make sure the translated map name wasn't being used in gsettings, so I learned how to use -d to merge po files.  It does seem fixed so I'll push this now.  Thanks everyone!

Attachment 254247 [details] pushed as 6b84b2c - Mark Easy map name as translatable