>> The following less trivial example writes the Russian word “slon” (elephant) in Cyrillic letters:
Why are you tagging the word “elephant” with a country? This word is written in Cyrillic characters, which are used in many countries:
Why do you consider it Russian?
The word "slon" is Russian. It seems unhelpful for the example to specify what other languages may also have incorporated the word "slon" into their vocabulary. To not specify at least one language as containing "slon" also seems unhelpful.
Slon is slavic word. Almost all slavic languages use the same word - Czech, Polish, Slovak, ... and in this case it is not taken from Russian