I have this problem with the app, both Android and Apple. I do not use the website. Actually, the website is configured with my maternal language, French so it's a different kind of issue at the moment.

I have logged out of the app and back several times and I have tried on several devices (Android phone, iPad mini) and the problem is still there.

If I do the LingQ 101 - Getting started lesson, I do have the translation if I click on a word, but if I do the other lessons, like "Lesson 1 Михаил работает поваром" I do not have the translation. When I click on a word, in the place where I get the translation in the other lesson, I simply get the word in Russian again.

Edit: after doing it again a couple of times (switching between the two lessons) while writing this response, now it seems to work... I did not go in the settings, just switching back and forth between the two lessons.

Since it seems to work at the moment, I am going to do a few lessons to see if it sticks :)

Edit 2: and now the website is in English too :) Not sure how all this happened, but I am OK for now, thank you!