I read one of your earliest posts, you know 7 languages, and three of them fluently. I use English, Mandarin (Chinese) and Japanese. I can say that in Mandarin and Japanese, 'round' can refer to 'sphere' even 2000 years ago, and people will understand the context. Indeed, it would be very unusual to say sphere, it is quite a technical term. People usually say round in normal conversations and they know it means sphere according to context. For Mandarin and Japanese I can say they do. Even in modern English, I believe so too.
Do modern and ancient texts use of 'round' and 'sphere' have to be mutually exclusive? I don't think so.
One of your posts say you know 7 languages, and 3 of them fluently. Do these languages never use 'round' to imply 'sphere' 1000 years ago?