> spelling and punctuation mistakes > excellent written English

Erlang's syntax, naming, and abbreviation conventions are straight schizophrenic.

Keywords, directives, method/module names, variables, and arguments are randomly spelled out, others shortened, if you're lucky with underscores or CamelCase, there are some familiar C style conventions but not widespread, directory structure seems to be highly project dependent, etc. - the list goes on.

It's a very "cluttered" language and the lack of a strong proficiency in written English as you mention clearly shows (to me) in the language/framework.