Retired Microsoft CEO Bill Gates may be worth nearly $80 billion, but he’s not totally satisfied.

In a Redditt chat Wednesday,  when asked if he regretted not doing something, Gates said he wished he knew a foreign language.

"I feel pretty stupid that I don't know any foreign languages. 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. I keep hoping to get time to study one of these - probably French because it is the easiest. I did Duolingo  for awhile but didn't keep it up. Mark Zuckerberg amazingly learned Mandarin and did a Q&A with Chinese students - incredible."

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Gates was the richest American in 2014, according to Forbes.