Unfortunately you can't use other cheats. I'm really SORRY for that.
The usage is very easy.
1. Download the "Language Cheat Creator for AKAIO" here.
2. Copy the "AKAIOLanguageCheatCreator.nds" file to the root of your Micro SD Card
3. Start your DSi and the Acekard 2i
4. run AKAIOLanguageCheatCreator.nds
5. Choose your favorite language and press 'A' to create the cheat files
6. Wait a while till you see "Finished.";
7. Restart your DSi and start AKAIO, enable cheats in Start -> System Options, go to "Default Patch Options" with L/R Buttons and set "Cheat code usage" to Enable
8. Play all games in your language :)
Furthermore DON'T CLICK on "cheats" in the menu because the AKAIO Firmware will delete the *.cc file and the game will be in english.
If you find any bugs just tell me.