1. Write pages in the language you’re learning and look up translations without having to switch context
2. Get feedback on your writing automatically with suggestions on grammar and spelling and ask a person you know to correct it
3. Create cards both from corrected text and translations and review them with spaced repetition to learn from your mistakes and expand your vocabulary
That said, when that time comes, I believe it only fair to try and keep early users with at least the current functionality available to them.
For instance, a translation service won't advise me on whether the preterite or imperfect was more suitable, and in fact, that sort of nuance is often conflated to the same translation in English.
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I haven't signed up yet, but I like the look of it so far.
To address this with Felingua I've added in two methods of getting corrections on the pages you write:
1. Automatically, by using LanguageTool.
2. Manually, by allow you to request people you know to review.
Feel free to let me know your thoughts if you decide to give it a try!
That said, I do plan on exposing the API and allowing full data exports, but I haven't gotten to that yet.
Is there any language in particular you'd like to see added?
What is there to support? You've got to connect it to a translation service? Is there not just a Google API?