Improving English language strings
Suggested fixes for typos or misspellings and any other suggested improvements to English language strings in the Moodle core may be submitted via the Translation site by contributing them to the English (fixes) (en_fix) language pack, as described in contributing a translation. They will then be reviewed and merged with the English (en) language pack two weeks prior to each release (as mentioned in Release process).
US English versions of words e.g. 'color' versus 'colour' and 'point' versus 'mark' can be contributed to the English - United States (en_us) language pack, as described in contributing a translation.
Similarly, simplified English words and phrases for use with younger children can be contributed to the English for kids (en_kids) language pack, and 'Talk Like a Pirate' day phrases can be contributed to the English - Pirate (en_ar) language pack.
Suggested fixes for typos or misspellings and any other suggested improvements to English language strings in any of the 1000+ additional plugins available for Moodle should be forwarded to the plugin maintainer listed in the Moodle plugins database. Most plugins maintainers will be happy to receive suggestions for improving their plugin.