Modern English has changed significantly since 1800 due to a large increase in vocabulary from fields like science, the combination of old words, changes to word meanings, and influences from other languages. The Oxford English Dictionary was the first to document all English words, including obsolete ones, and helped understanding of the language. Pronunciation standards became less rigid over time as well, and the rise of technologies like radio, television, and the internet further drove changes by popularizing new words and expressions and making regional accents more widely accepted.