I would like to request that the team consider adding the plural of certain words.
In languages like Arabic, the structure of the word changes completely as does the pronunciation, e.g. fruit, singular = فاكهة [pronounced faakiha] ; fruits, plural = فواكه [pronounced fawaakih]. The application only teaches the latter. You could denote singular with an s. and plural with a pl. for instance (for English-speaking learners).
I say certain words above because I feel that for some it is not necessary, e.g. heartbroken. This would be so useful and would really set this application apart from others.