Visual language refers to the idea that communication occurs through visual symbols, as opposed to verbal symbols or words Contrast to a sentence construction in spoken language with a linear ordering of words, a visual language has a simultaneous structure with a parallel temporal and spatial configuration Inspired by Deikto [5], we propose a two-dimensional string or sentence construction of visual expressions, i.e spatial arrangements of symbols, which represent concepts A proof of concept communication interface has been developed, which enables users to create visual messages to represent concepts or ideas in their mind By the employment of ontology, the interface constructs both the syntax and semantics of a 2D visual string using a Lexicalized Tree Adjoining Grammar (LTAG) into (natural language) text This approach captures elegantly the interaction between pragmatic and syntactic descriptions in a 2D sentence, and the inferential interactions between multiple possible meanings generated by the sentence From our user test results, we conclude that our developed visual language interface could serve as a communication mediator.