"Yandex is basically Russia only"

Not entirely. [0]

Here is Yandex’s market share in several countries (Statcounter, July 2019):

    Russia: 48.79%
    Belarus: 22.38%
    Kazakhstan: 21.88%
    Tajkistan: 15.12%
    Uzbekistan: 11.87%
    Turkey: 10.67%
    Kyrgyzstan: 9.61%
    Turkmenistan: 6.73%
    Ukraine: 5.98%
    Armenia: 4.20%
    Moldova: 3.40%
    Georgia: 2.85%
    Azerbaijan: 2.06%

[0] https://searchfacts.com/what-is-yandex/