Humans learn language by listening, speaking, writing, reading, and also, via interaction with the multimodal real world. Existing language pre-training frameworks show the effectiveness of text-only self-supervision while we explore the idea of a visually-supervised language model in this paper. We find that the main reason hindering this exploration is the large divergence in magnitude and distributions between the visually-grounded language datasets and pure-language corpora. Therefore, we develop a technique named "vokenization" that extrapolates multimodal alignments to language-only data by contextually mapping language tokens to their related images (which we call "vokens"). The "vokenizer" is trained on relatively small image captioning datasets and we then apply it to generate vokens for large language corpora. Trained with these contextually generated vokens, our visually-supervised language models show consistent improvements over self-supervised alternatives on multiple purelanguage tasks such as GLUE, SQuAD, and SWAG. 1 listening learn Vokenization Humans learn language by listening, speaking ... humans Language Input BERT Transformer Model Masked Language Model [MASK] language by [MASK] speaking humans Language Input BERT Transformer Model Voken Classification Task [MASK] language by [MASK] speaking Masked Tokens Vokens (Token-Related Images)