I've been trying to translate the products on my Woocommerce shop but unfortunately I can't. My products' images have Bulgarian language and I want to translate it into English and Russian. I duplicate the products but I also duplicate the media files and I cannot change it later. There is a lock icon and a text that says I cannot change it.
I have already made the images into English and Russian and I don't particularly need media translation.
From your post, it seems like you have duplicated the product using the WPML duplicate feature, Correct me if I am wrong. if that is the case, please make sure you have clicked the Translate independently button in the languages section (refer screenshot) this will enable you to edit the translation and the images as well.
Please go to WPML > Settings > Media Translation select the option
[X}: Translate existing media in all languages and click start
Wait for the process to complete. Once done check if you can change the product images for the translation.