I am trying to make a simple translation app for japanese. Japanese is the target language. I am using native translator extension. It works well, I get the japanese text with japanese text characters. What I need is pronunciation text of japanese translation. For example hello -->こんにちは but I need Kon'nichiwa
You can try using Google Translate like this
Where ja is the key for Japan and TextBox1 contains こんにちは . To bring up the screen.
First enter the word in Japanese ( 1 ), then select the Button ( 2 ) then select the sound icon (3). If you device is audio is turned up you should hear the word pronounced in Japanese.
Perhaps you can adapt this to your requirements. 
because the technique requires you to supply the Japanese word in glyphs.