Why do many christians think that Marks use of Aramaic words increases the authority of his gospel?

Many Christians believe that Mark's use of Aramaic Words gives his Gospel an authentic and firsthand connection to Jesus, who likely spoke Aramaic. This is seen as increasing the credibility and authority of Mark's account of Jesus' life and teachings. Additionally, the use of Aramaic Words adds depth and richness to the narrative, providing a cultural and linguistic context that enhances the readers' understanding of the text.