Based on my "How To", to change the Smartphone input language to another than the UI language, my fellow MVP Marc Zimmermann, developed a small free tool called "T9 Config Utility" which is available from Handango now:
By default, the Smartphone 2002 platform links the phone user interface language and T9 predictive text input language. For example, this linkage effectively makes writing German text with an English language phone impossible.
This program allows you to make these assignments freely and according to your preferences.
Please keep in mind that the T9 Config Utility is neither certified nor signed. Therefore, it can only be used on application certified unlocked phones.
Great work Marc! Something which is really handy! :-)
Cheers ~ Arne
Related Links : [Download Here]