How does a Yardrat know that Vegeta became faster than Goku? In Dragon Ball Super manga #55,


   A Yardrat who's teaching Vegeta techniques, says he's faster than Goku


Is Goku supposed to be traveling to Yardrat often or something? How does a Yardrat know that Vegeta became faster than Goku?
This is a mistranslation.
The official translation (found on Mangaplus, page 6) clearly says (in Elder Pybara's words) :

&quot;Your spirit is now more polished than Goku's, and you managed it in no time.&quot;

Elder Pybara was comparing their respective trainings' duration. As stated within Dragon Ball Super (chapter 53, page 48), Goku spent 150 days meditating upon a training spire and Vegeta had to achieve comparable results in only 10 days. Elder Pybara's reaction clearly indicates that Vegeta did train quite faster.