Can I install additional language support (Russian) on HTC Desire HD without rooting? I bought HTC Desire HD and I want to change UI language to Russian. The issue is that I see in settings only English, German, Italian and French.

Is it possible to add other language without rooting phone?
You can use the same app that I found for my problem to fix yours:

Custom Locale



Just install it and then select Russian as your predefined language and you're good to go mate.