In Finnish translation there's this easy-to-fix error:
" is required." is translated as "on pakollinen.", missing the space in the beginning. It should be " on pakollinen." instead.
Hope this makes it to the next update.
Also, I don't know why, but despite "Location name" being translated as "Tapahtumapaikan nimi", our site shows "Location nameon pakollinen." when submitting an event without a location. Other strings translate correctly, for example "Tapahtumapaikan osoiteon pakollinen."