I don't know which category you are applying but I'm sure English language requirement is same for settlement. If you read tier 1 Entrepreneur current guidance page 42 which states:
Knowledge of Life and Language - settlement When you apply for settlement you are required to show that you have knowledge of life and language in the United Kingdom before you can be granted (unless you fall under an exemption). You can demonstrate this by passing both the Life in the UK Test and holding an English speaking and listening qualification at level B1 or above (please note: both Academic and General training are acceptable). More information on Life in the UK Test including how to book and the relevant exemptions can be found here:
www.gov.uk/life-in-the-uk-test. More information on the language requirement can also be found here:
www.gov.uk/english-language.
I hope this will help you.