If I can suggest 
There is boost::locale library for C++, not widely used, but...
In short: http://www.boost.org/doc/libs/1_48_0/libs/locale/doc/html/locale_gen.html
setting env. variable LC_CTYPE or LC_ALL or LANG could extend PortableApps language settings to whole applications, not launchers only.
Please consider that idea.
You are here
Future version: consider boost::locale env. vars
November 9, 2013 - 6:09pm
#1
Future version: consider boost::locale env. vars
Visit the Community page
Join our forums
Subscribe to our email newsletter
Subscribe with RSS
Follow us on Facebook
Follow us on LinkedIn
Follow us on Twitter
Follow us on Mastodon
Follow us on BlueSky
Many of our launchers pass on the platform's language settings using one of these environment variables. Many of the GTK-based apps, for instance (GIMP, Pidgin, Gnumeric, GnuCash, etc). I'm not aware of any non-PA.c Format apps that are portable and support the variables, which is what this would affect. Are there many?
Sometimes, the impossible can become possible, if you're awesome!