It's possible to find an English translation. Sometimes, fan translators take on such projects and share them on specific platforms. You could search on those to see if it's available.
Well, 'A Certain Someone' stands out because of its rich world-building. The detailed settings and vivid descriptions make you feel like you're right there in the story. Plus, the author's way of handling the relationships between the characters is really touching and realistic.
Generally, others won't be notified if you take a screenshot of a story. However, some platforms might have tracking or analytics that could potentially detect such actions, but this is rare and often for internal purposes only.
One way could be to read summaries or reviews that focus on specific parts. However, this might not give the full experience. Another option is to ask someone who's familiar with the story to point out the relevant sections.
There are different scenarios depending on the app. For example, in some messaging apps with a private media sharing feature, if the app is designed to enhance the sender's control over their content, it might have a mechanism to let the sender know if you replay a private video. This could be for security reasons or just to give the sender more information about how their content is being interacted with. However, in other apps that are more about general sharing without much emphasis on privacy in this regard, the sender may not be able to tell if you replay their private video.