For anyone wondering how to install voice typing, I've found a solution.
First of all, download the latest update for the stock ROM here : http://www.needrom.com/mobile/huawei-honor-3/
It's the one from December 2013. Download it and put it on the SD card, then go on software update and apply the local update.
If you have trouble downloading it, please reply here or send me a PM, as I have it on my Drive.
After this, the phone will detect another small update (less than 30 mB), it should be called HN3-U01V100R001CHNC00B119 (or HN3-U01V100R001CHNC00B119SP01).
After rebooting, voice typing should be working
Current devices : Maxtron Diamond, Samsung Galaxy Tab 2 7.0 (GT-P3110), Evercoss A7S
Old devices : HTC EVO 3D (ShooterU), Sony Live with Walkman, Samsung Galaxy Tab