I thought that the Google Translate corpus consisted of largely documents that were translated between multiple languages. In that case there was probably conte

I thought that the Google Translate corpus consisted of largely documents that were translated between multiple languages. In that case there was probably context telling the translator the gender, or they were translated from English with a gender to gender-neutral. In this case I would expect that barring any other influence these are just whatever gender happened to be the most common for each verb in the input texts.