How do I recover my Apple Account without security question answers?

Account Recovery, or enabling two-factor authentication. (Enabling two-factor gets rid of the security questions.)

• How to use account recovery when you can’t reset your Apple Account password - Apple Support
• Two-factor authentication for Apple Account - Apple Support

If your password was re-used and with no-two-factor authentication enabled, it’s also quite possible the account has been taken over, and is effectively no longer yours. Some of these take-over cases can result in the security questions are shown in an unfamiliar language.