HTC Touch diamond keyboard is a coolest virtual keyboard for HTC touch diamond, its available in many different languages Czech, Dansk, Dutch, French, English, Hungarian and more, first you need to install the gullum_diamond_keys and then select your language pack.

Touch Diamond keyboard all are working with xt9 except for Arab need more files
Touch Diamond keypad all are working with xt9 except for RUS ARB and GRK need more files
Touch Diamond qwerty is now working with all languages in portraid mode except RUS ARB and GRK.. still no go for landscape…. but most that would type in landscape mode have a hardware keyboard

Download cab files here | Download Complete Language Pack

nb: you need to register and activate your account to download the files.