Hierarchical Character-Word Models for Language Identification
  Social media messages' brevity and unconventional spelling pose a challenge to language identification. We introduce a hierarchical model that learns character and contextualized word-level representations for language identification. Our method performs well against strong base- lines, and can also reveal code-switching. 
Aaron Jaech and George Mulcaire and Shobhit Hathi and Mari Ostendorf   and Noah A. Smith
cs.CL