How to fix LaTeX \glqq or \grqq error 'Undefined control sequence'


You have LaTeX code containing \glqq and/or \grqq like


\glqq Test\grqq

but when you try to compile it, you see an error message like this:

! Undefined control sequence.
l.5 \glqq


In order to use \glqq or \grqq you need to include


after your \documentclass declaration.

In case you want to use another language, use the correct language specifier instead of ngerman.