Well, it's a solution for many browsers and softwares on linux. I just tried and works.
LC_ALL is the environment variable that overrides all the other localization settings.
LC_NUMERIC selects the numeric formatting category of the C locale
So the first command set the locale to the livecode locale. Widget are so strict that a different locales means problems.
LIBGL_DRI3_DISABLE disable DRI3 (Direct rendering version 3), any value activate this flag, so 1 means nothing. It could be 2 or "hello world".