Earlier quoted context omitted.
Ah I see, these are just "official" languages. Otherwise probably the whole planet would be highlighted for English.
Highlighting proportions via color intensity would help. But this information is buried deep down in Google and Facebook and is sometimes outright illegal to disseminate (like in French vs Dutch at the level of Belgian municipalities). Before Cambridge Analytica scandal Facebook business accounts had access to numbers down to a few thousand with regards to the interface language. I remember that some 80% of Ukrainian…
For most Ukrainians, Russian is (was?) a happy medium between being a language that they understand, and a language that is well supported in localizations.
I speak en-GB but I prefer an interface in en-US. Yet if you asked me to speak en-US with all its grammatical, lexical and phonological differences intact I would fail because my understanding is read-only.