There are 2 simple rules for the best learning process:

1. When the bot asks you to respond in your native language:

then just press the button "Show answer".

Now assess yourself using buttons "I know" or "Repeat". If you answered using a synonym then this is a correct answer.

2. When the bot asks you to answer in the language you are learning: 

then type the answer:

and this time be careful with the synonyms and word forms.