There's really no reason to rely on Memrise for this feature. It can be easily integrated and personally configured within your browser. Google provides a very useful set of input tools that work well with Memrise.
Google Input Tools
Google Input Tools for Windows is an input method editor which allows users to enter text in any of the supported languages using a Latin (English / QWERTY) keyboard. Users can type a word the way it sounds using Latin characters and Google Input Tools for Windows will convert the word to its native script. Available input tools include transliteration, IME, and on-screen keyboards.
Google Input Tools for Windows is currently available for 22 different languages: Amharic, Arabic, Bengali, Persian, Greek, Gujarati, Hebrew, Hindi, Kannada, Malayalam, Marathi, Nepali, Oriya, Punjabi, Russian, Sanskrit, Serbian, Sinhala, Tamil, Telugu, Tigrinya and Urdu.