He worked under the auspices of the Anglican Church Missionary Society (CMS).
Nyländer grew up in Lithuania and then attended a seminary in Berlin.
[1]: 21 Nyländer arrived in Sierra Leone in September 1806 with Leopold Butscher and Johann Prasse, all three of them Lutherans.
Their instructions were to leave the settlement to work amongst the Susu people as soon as possible.
In 1814 he published Grammar and Vocabulary of the Bullom Language and Spelling-book of the Bullom Language: With a Dialogue and Scripture Exercises[1]: 21 He subsequently moved to Kissy a village founded to cater for recaptives, enslaved Africans liberated by the Royal Navy's West Africa Squadron near Freetown.