You need to add a code to the template checking for a certain category, this is not something I can provide from the back of my head, but it will be something like if cat =="something" echo class="no_translate" in the correct place in accordance to your theme
Unahitaji kuongeza code kwa kuangalia baadhi ya template kwa jamii, hii si kitu mimi inaweza kutoa kutoka nyuma ya kichwa yangu, lakini itakuwa kitu kama if cat =="something" echo class="no_translate" katika sehemu sahihi kwa mujibu wa mada yako