WRITING SYSTEM :

Main articles: English alphabet and English orthography
Since around the ninth century, English has been written using the Latin alphabet, which replaced Anglo-Saxon runes. The spelling system, or orthography, is multilayered, with elements of French, Latin and Greek spelling on top of the native Germanic system; it has grown to vary significantly from the phonology of the language. The spelling of words often diverges considerably from how they are spoken.
Though letters and sounds may not correspond in isolation, spelling rules that take into account syllable structure, phonetics, and accents are 75% or more reliable.Some phonics spelling advocates claim that English is more than 80% phonetic.
In general, the English language, being the product of many other languages and having only been codified orthographically in the 16th century, has fewer consistent relationships between sounds and letters than many other languages; for example, the sound sequence ough can be pronounced in not less than seven different ways. The consequence of this complex orthographic history is that reading can be challenging. It takes longer for students to become completely fluent readers of English than of many other languages, including French, Greek, and Spanish.