clean up error message i18n and syntax; distinguish between mouse and turtle in error messages
clean up error message i18n and syntax; distinguish between mouse and turtle in error messages

eohomegrownapps/musicblocks,walterbender/musicblocks,Hrishi1999/musicblocks,walterbender/musicblocks,walterbender/musicblocks,eohomegrownapps/musicblocks,Hrishi1999/musicblocks,Hrishi1999/musicblocks,eohomegrownapps/musicblocks