Microsoft founder Bill Gates held his third Reddit "Ask Me Anything" on Wednesday and surprised his audience by revealing, among other things, one thing that makes him feel "stupid."

"I feel pretty stupid that I don't know any foreign languages," Gates said. "I took Latin and Greek in high school and got A's and I guess it helps my vocabulary but I wish I knew French or Arabic or Chinese."

The global philanthropist said that he hopes to follow Facebook CEO Mark Zuckerberg's example in learning a second language.

"I keep hoping to get time to study one of these -- probably French because it is the easiest," Gates said. "I did Duolingo for a while but didn't keep it up. Mark Zuckerberg amazingly learned Mandarin and did a Q&A with Chinese students -- incredible."

When asked what he believes personal computing will look like in 2045, Gates said there will be more progress in the next 30 years than ever before.

"Even in the next 10 problems like vision and speech understanding and translation will be very good. Mechanical robot tasks like picking fruit or moving a hospital patient will be solved. Once computers/robots get to a level of capability where seeing and moving is easy for them then they will be used very extensively," he said.

Gates revealed that he is working on a project with Microsoft called the Personal Agent, which will work across all devices and remember everything. It will help users find things and help users pick what things to pay attention to.

Concerning what he would have done if Microsoft had not worked out, Gates said, "I would probably be a researcher on AI (artificial intelligence). When I started Microsoft I was worried I would miss the chance to do basic work in that field."

Gates revealed during the AMA that he is "in the camp that is concerned about super intelligence." He said if we manage machines well, it should be positive; that machines can do a lot of jobs for us and not be super intelligent.

"I agree with Elon Musk and some others on this and don't understand why some people are not concerned," he said.

The life lesson that Gates learned the hard way? "Stay up too late even if the book is really exciting. You will regret it in the morning. I am still working on this problem," he said.

Gates also posted a link to the annual letter that he and wife Melinda published. This year's letter focuses on "in the next 15 years, life will improve faster for people in poor countries than it ever has before."