XP Leveling up
How do you see how much farther you have until you level up?
There is an ongoing test that allows some users can see this information on the profile page. From your profile page, I can see the below.
French - Level 6
Next level: 255 XP
Total XP: 495 XP
If you don't see this information, probably you are not in the test group. You can try using Duocheck to check the amount of XPs needed to level up.