Different levels of difficulty
Some people might be just learning French. Basic words are more relevant to switch. For more fluent speakers, having harder words more-frequently highlighted would be great. Maybe make people take a 5 min test on install, or be able to take it anytime to test competency?
Gradually translate all words
It seems that when I click "I know this word" it doesn't translate it again the next time. But when I know a word, I want it to translate every time, with the goal that eventually all words will be translated to French, so I'm reading the entire article in French, except for the words I haven't learned yet -- which will gradually be highlighted and translated.
Some things translate better as a phrase than as a single word. Sometimes words are translated wrong within their context. Short phrases could be better sometimes
It would be great to see the different verb conjugations for a given tense when you hover over a conjugated or infinitive verb.
Translate any selected text
For words and phrases not in Fluent, I would like to select and right click to see a translation.
Higher translation count
This would allow the user to start out only at a few words per page, and increase until nearly the entire page has been translated. Alternatively, you could make it so correctly answering questions also increases translations.
Pronounce the word when hover
The option to make Fluent pronounce the words when hover (maybe after 1 sec of hover). it's annoying to keep clicking the speaker icon every time
listen in pratice
Love the quick practice. Please consider adding a feature to be able to listen to the words while you practice :)