Sony Mobile has updated the Xperia Keyboard to version 6.6.A.0.30 (from build number 6.4.A.1.24). The new update includes a number of improvements such as faster response times, the ability to select different keyboard layouts for each language and you can also now get word suggestions for one language at a time (disable Smart language detection first).
Other improvements include updated layouts for Hungarian, Bosnian, Croatian, Slovenian, and Serbian as well four new language support (Tajik, Uzbek, Welsh, and Irish). The update is now live on the Google Play Store.
DOWNLOAD APK: Xperia Keyboard (6.6.A.0.30)
Thanks Ben and Himath!