I noticed that clicks to the hamburger menu icon in the top left corner and the languages icon at the bottom of the page were very similar [1], so I thus thought it would be interested to look at both of these elements on a per project level.
I took a sample day and constructed this table comparing clicks to the language button compared to the languages button.
I then divide clicks to hamburger by clicks to languages.
My hypothesis is that if clicks to the language icon are considerably higher than clicks to the hamburger icon the less recognisable the hamburger icon is in that language.
I filtered out wikis where the clicks to languages were less than 50, as I decided the data set for those were too small.
Interestingly for enwiki the score is close to 1 (0.9625941071), a language I would expect this icon to translate well.
For azwiki (Azerbaijani language) the language button has considerably more clicks - 1366 compared to 487 (0.3565153734)
Other WIkipedias where the hamburger icon might not be translating well (where score is less than 0.5): Bosnian, Polish, Japanese, Korean.
I've shared my data on a public URL, feel free to explore, analyse, comment [1]. As a next step it would be interesting to pick a project e.g. Japanese, monitor clicks to hamburger vs language and see how these values change with a different value.
[1] http://mobile-reportcard.wmflabs.org/#graph-limn225 ui daily graph [2] https://docs.google.com/spreadsheets/d/1aCddwCiTCrDdKivLIYFujef69k-uB0DtsqJq...