Nisha and Michaela will be able to understand every language and code, including made-up ones. This could be through spoken word, writing or signals. The meaning will decipher itself in their minds, and will be translated into their first languages. The ability can also be used to write messages in a code which would be completely indecipherable to all except those they intend to communicate with. If they wanted to, they could leave a message which no one except themselves would be able to understand. Another with this ability would be able to interpret it, but no one else would, even if they possessed omnilingualism or communication.