Please check the video tutorial to see how to save the translation file correctly. You can remove the plugin and translations would remain. Also, translations would remain after each theme update.
I’m just asking whether it is safe to change it because I saw another post on this forum about this in which Woodmart support did not recommend to change it…
String “Categories” from the mobile menu is also used in the Categories menu in the Shop page title https://prnt.sc/vvkyzr on mobile, when you change it it would be changed in both places, that is why you could meet the recommendation not to translate that. If you do not use the categories in the title, no problem.