DeepSeek stopped answering me in English! it switched to Chinese, unless I specifically asked it in the prompt to answer in English

Even if the entire prompts is in English, I don't get a reply in English unless I wrote in the prompt "answer in English". if I didn't write so, it'll 100% answer in Chinese. I tried wiping out all my chats, made sure Language is "English" in the settings, and opened a new incognito browser to see if it'll stop answering me in Chinese, but it still does!