Sets the function which is used to translate the contexts
user-visible strings, for --help output.
If func is NULL, strings are not translated.
Note that option groups have their own translation functions,
this function only affects the parameter_string (see g_option_context_new()),
the summary (see g_option_context_set_summary()) and the description
(see g_option_context_set_description()).
If you are using gettext(), you only need to set the translation
domain, see g_option_context_set_translation_domain().
Since 2.12
Sets the function which is used to translate the contexts user-visible strings, for --help output. If func is NULL, strings are not translated. Note that option groups have their own translation functions, this function only affects the parameter_string (see g_option_context_new()), the summary (see g_option_context_set_summary()) and the description (see g_option_context_set_description()). If you are using gettext(), you only need to set the translation domain, see g_option_context_set_translation_domain(). Since 2.12