To select the language, navigate to the Settings (right sidebar) and pick the one from the drop-down list. At the moment, there are five languages available: English, Українська, Русский, Español, and Português.

settings icon to select the language

The same setting window allows you to choose Unit System that can be either Metric: kg, ha, m/s, mm, °C or Imperial: lbs, ac, mph, inch, °F.