I bought Sleeping dogs for Xbox 360 and it is a japan import disc. The voices are in English but all the texts are in Japanese. How will I change the language texts to English?

To change the text language to English in your Japanese import copy of Sleeping Dogs for Xbox 360, you may need to check the game's options menu for any language settings. If there isn't an option available within the game, the text language is likely hardcoded and cannot be changed. Alternatively, you can look into regional settings on your Xbox 360 console, but this may not always affect the game's text language. If all else fails, consider looking for a patch or fan translation, but this can be complex and not officially supported.