When using Japanese romaji keyboard, attributes repeated twice

[MichaelRooba]

I am using this library, everything is normal, but when coming to Japanese Romaji keyboard, I am selecting the text from dropdown , which has Japanese letters and english letters combined. I apply attribute(which is a link) to that text for the whole range , but it splits the word into two which has Japanese letter, and English letters and applies the attribute, so attributes are applied twice