Since this is not apart of the git repo I am posting it here. I assume your logo's "O" should be the image.
@julian yes fixed!
Vanilla seems to not have those, made an issue https://github.com/NodeBB/nodebb-theme-vanilla/issues/34
If a use sets up pagination instead of infinite scrolling this doesn't affect the popular page.
Also, the Post quick reply button of the default theme (as well as other texts) are also not translated. This is tho, there is variable set for translation. @julian
Actually, I meant the browser cache. Anything NodeBB caches server-side is cleared when it is rebooted