Power BI Desktop: 2.75.5649.221 64-bit (November 2019)
“From Marketplace” is now “From AppSource” in this Update (November 2019).
You can see that when you click ... menu on Visualization pane.
That should be ‘AppSource에서 가져오기’.
Based on my test with the latest Power BI desktop English version 2.75.5649.801, it's "Import from marketplace". So the translation of the "Import from marketplace" in Korean desktop version is correct.
Best Regards,Qiuyun Yu
As mentioned above, It is changed "Marketplace" to "AppSource" in Power BI Desktop Update(November).
We can see on Updated Ribbon(Preview), so I think that other menu not yet update.