PT Sans
ParaType · Alexandra Korolkova, Olga Umpelova and Vladimir Yefimov · 2010

The free, open-source humanist sans commissioned by the Russian government to cover every minority language written in Cyrillic.
About
PT Sans was commissioned by Rospechat to mark the 300th anniversary of Peter the Great's orthography reform, with a brief to cover almost every minority language of the Russian Federation alongside Latin. Basic weights are free under an open licence, while a Pro edition adds light, demi-bold, extra-bold and black weights across narrow, condensed and extra-condensed widths. A genuine workhorse rather than a display statement.
Classification
A humanist sans with enhanced legibility built for broad Cyrillic-minority-language coverage, sitting between conservative and contemporary in tone.