This is a simple font without any ambitions. Based on simple square geometry it has retrofuturistic flow. Probably with the constructivism architectual touch. Small caps only. As it is simple font it’s includes just basic punctuations and symbols.
However ST-SimpleSquare supports 15+ languages:
Latin: English, German, Italian, Norwegian, Swedish, Danish, Slovenian, Croatian, Finnish
Cyrillic: Russian, Belorussian, Ukrainian, Bulgarian, Serbian, Makedonian