The present invention relates to embedding metadata with user interface messages. One method embodiment includes: encoding the metadata into a sequence of non-displayable characters; combining the displayable data and the sequence of non-displayable characters; and sending the combined displayable data and sequence of non-displayable characters to a client for display. In examples, the displayable characters may be displayable Unicode characters, and the non-displayable characters may be non-displayable Unicode characters, such as the left-to-right mark (0x200E) and the right-to-left mark (0x200F).