HELP PLEASE Which app would require two people to know the same language but not require either to speak aloud in order to communicate?

A language learning app
A language translation app
An electronic notepad app
A speech-to-text app

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A language learning app, like Duolingo, would only require one person, since it person vs computer

An electronic notepad app, i dont think that has anything to do with language?

A speech to text app would defeat the whole purpose of not speaking aloud, so thats not correct.

The only one that makes sense is a language translation app, like iTranslate, which allows people to speak to it, but ONLY if they want, because they can type the words they want to translate.

Hope this helps! Please let me know if you need more help, or if you think my answer is incorrect. Brainliest would be MUCH appreciated. Have a great day!

Stay Brainy!

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answer; /// i believe the correct answer is (color filter);

answer: b

explanation: