L. extendere to spread out, extend, but influenced by E. stand.
Any language has rules that govern the correct use of that language.
Many of the world's languages, if not all have some exceptions to those rules. I before E, except after C, is an example of an exception in the English language. The word spelled read can be the past or present tense of the verb. There are rigid standards in how a structure in a file must be constructed to produce the desired result. For they do not wash their hands when they eat bread.