First of all, I would like to apologise to the poster for this question. I am not sure how I missed it but I imagine it is long and pointless for you to read it. With that said I think it is still helpful for others.
Can gentiles observe Yahrzeit and recite Kaddish in English for a very close Jewish friend even though his family will be observing with their community?Question by Sheri
Yes, it is possible for gentiles to observe Yahrzeit and recite Kaddish in English for a close Jewish friend. Yahrzeit is the anniversary of a loved one’s death, and it is traditionally observed by lighting a candle and saying Kaddish, a prayer that praises God and reaffirms the individual’s faith. Kaddish is typically recited in Hebrew, but it can be recited in English as well.
Kyle ben Avraham Avinu (קייל בן אברהם אבינו) (2022) Gentiles and Yahrzeit. [online] Ask a Jew. Available at: https://askajew.co.uk/question/gentiles-and-yahrzeit/ [Accessed 06 Dec 2023]