Ortholinguistics emphasises the use of language that glorifies God and promotes mutual edification and co-prosperity. This involves using truthful, edifying, and encouraging words, bridging senior and junior leadership, and encouraging one another.

The ability to communicate the gospel message in different languages has been crucial in spreading Christianity. Missionaries must learn the language and culture of the people they are trying to reach, so they can communicate the gospel message in a way that is relevant to the local context.

For example, Francis Xavier developed a method of evangelism that incorporated elements of Japanese culture and language during the 16th century. Similarly, Hudson Taylor developed a method of evangelism that incorporated elements of Chinese culture and language during the 19th century.

The ability to speak the local language has also been crucial in establishing indigenous churches and developing local leadership. By training local people to become pastors and leaders, missionaries have been able to establish self-sustaining churches that are rooted in the local culture and context.

Today, the ability to communicate the gospel message in different languages is more important than ever. Missionaries and evangelists must speak the language of the people they are trying to reach and understand the local culture and context.

The early 20th century saw a significant revival of Pentecostalism and other charismatic movements that emphasised the gifts of the Holy Spirit, including speaking in tongues. The Azusa Street Revival, which began in 1906, attracted people from all over the world and was characterised by ecstatic worship, speaking in tongues, and other manifestations of the Holy Spirit.

The Underground Railroad was a network of secret routes and safe houses used by slaves in the 19th century to escape to freedom in the North or in Canada. The system was operated by abolitionists and other sympathisers who were committed to ending slavery and helping enslaved people to gain their freedom.

Negro spirituals, also known as African American spirituals, were a form of religious music that emerged from the plantations of the South during the 19th century. These songs were created by enslaved African Americans and were used as a means of expressing their faith and their hope for freedom and salvation.

The Black Holiness movement and the Pentecostal revival that emerged from the Azusa Street Revival had a significant impact on the African American church and on American Christianity as a whole. These movements emphasised the importance of personal spiritual experience and the gifts of the Holy Spirit, and they challenged traditional notions of race and class in the church.

Aimee Semple McPherson, who founded the International Church of the Foursquare Gospel in the 1920s, was a famous Pentecostal leader during this era. She emphasised the importance of the Holy Spirit's power and the belief that it is necessary for effective ministry in the church.