This DarkConsole beamer theme and template was created by Kazuki Maeda <kmaeda@users.sourceforge.jp> for Japanese presentations, but can be used for English (or other European languages) presentations as well. It has been modified to work with XeLaTeX.
A sample of a multilingual document (Arabic, Greek, Hebrew, Japanese, Serbian, etc.) created with babel and lualatex.
See also the following resources:
Multilingual typesetting on Overleaf using babel and fontspec (XeLaTeX and LuaLaTeX)
Gallery example here
Multilingual typesetting on Overleaf using polyglossia and fontspec (XeLaTeX and LuaLaTeX)
Gallery example here