how to force yast to output in English locale

when I am getting an output from the yast gui for a dependency requirement, how do I integrate the request LANG=en_GB.UTF-8 or similar of course for US if I wish the output in English. How would I force zypper to do so when bugreporting. (please be kind and put a complete syntax example if you have one as I will avoid to run into syntax issues on the head of it. Thank you for your patience).