-a, --extract-all
extract all strings (only languages C, C++, ObjectiveC, Shell, Python, Lisp, EmacsLisp, librep, Scheme, Java, C#, awk, Tcl, Perl, PHP, GCC-source, Glade)
-k, --keyword[=WORD]
additional keyword to be looked for (without WORD means not to use default keywords)
(only languages C, C++, ObjectiveC, Shell, Python, Lisp, EmacsLisp, librep, Scheme, Java, C#, awk, Tcl, Perl, PHP, GCC-source, Glade)
--flag=WORD:ARG:FLAG
additional flag for strings inside the argument number ARG of keyword WORD
(only languages C, C++, ObjectiveC, Shell, Python, Lisp, EmacsLisp, librep, Scheme, Java, C#, awk, YCP, Tcl, Perl, PHP, GCC-source)
-T, --trigraphs
understand ANSI C trigraphs for input (only languages C, C++, ObjectiveC)
--qt
recognize Qt format strings (only language C++)
--debug
more detailed formatstring recognition result