\documentclass{article}
\pagestyle{empty}
\usepackage{geometry,fontspec,tikz}
\geometry{a6paper,landscape,hmargin={1cm,1cm},vmargin={1cm,0cm}}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{ebgaramond}
\usepackage{etoolbox}
\usepackage{float}

\newtoggle{Vietnamese}

\ifdefined\ViFlag
\toggletrue{Vietnamese}
\else
\togglefalse{Vietnamese}
\fi

\usetikzlibrary{fadings}
\pgfdeclarehorizontalshading{FOne}{100bp} {
  color(0bp)=(pgftransparent!0);
  color(25bp)=(pgftransparent!0);
  color(50bp)=(pgftransparent!80);
  color(100bp)=(pgftransparent!100)}

\pgfdeclarefading{myfading}{\pgfuseshading{FOne}}

\pgfdeclarehorizontalshading{FTwo}{100bp} {
  color(0bp)=(pgftransparent!100);
  color(25bp)=(pgftransparent!100);
  color(50bp)=(pgftransparent!100);
  color(100bp)=(pgftransparent!100)}

\pgfdeclarefading{nofading}{\pgfuseshading{FTwo}}
\setlength\parindent{0pt}

\begin{document}
\begin{tikzpicture}[overlay,remember picture]
  \node[anchor=east,inner sep=0pt] (pic) at (current page.east)
  {\includegraphics[height=\pdfpageheight]{027-028}};
  \fill[white,path fading=myfading] (pic.north west) rectangle (pic.south east);
\end{tikzpicture}%

\obeylines%
{\addfontfeatures{Scale=2.4,LetterSpace=7,Color=red}
  \iftoggle{Vietnamese}{ THIỆP MỜI }{ INVITATION }}

\textit{%
  \iftoggle{Vietnamese}{
    Trân trọng kính mời bạn dự tiệc cưới của chúng tôi,
    \smallbreak
    \hspace{4.5cm}Nam và Hương.
  }{
    Dear friend,

    We'd love to invite you to our wedding reception.
    \smallbreak
    Sincerly,

    Nam and Huong.
  }
}

\medbreak
\iftoggle{Vietnamese}{
  {\addfontfeatures{Scale=1.3,LetterSpace=5,Color=red}\scshape Bao giờ?}
  \textit{%
    Chủ Nhật, ngày 1, tháng 3, năm 2020
    4 \kern.5pt:\kern.5pt 00 chiều
  }
  \smallbreak
  {\addfontfeatures{Scale=1.3,LetterSpace=5,Color=red}\scshape Ở đâu?}
  \textit{%
    Trung tâm Tiệc cưới - Hội nghị Âu Cơ,

    1A Nguyễn Hữu Cầu, Phường Ngọc Châu,

    Thành phố Hải Dương, Hải Dương
  }
  \begin{figure}[H]
    \hspace*{1cm}\includegraphics[height=3.1cm]{qrEvent_vi}
  \end{figure}
}{
  {\addfontfeatures{Scale=1.4,LetterSpace=5,Color=red}\scshape when?}
  \textit{%
    March 1\/\rlap{,}\textsuperscript{st} 2020
    4\kern.5pt:\kern.5pt00 pm
  }
  \smallbreak
  {\addfontfeatures{Scale=1.4,LetterSpace=5,Color=red}\scshape where?}
  \textit{%
    Auco Convention Center,

    1A Nguyen Huu Cau Str, Ngoc Chau Ward

    Hai Duong City, Hai Duong
  }
}

% \newpage
  % {\addfontfeatures{Scale=1.4,LetterSpace=5,Color=red}\scshape 
    % \iftoggle{Vietnamese}{Chỉ dẫn}{Direction}
  % }
  % \medbreak

% \begin{tikzpicture}[scale=1, transform shape]
  % \node[anchor=center,inner sep=0pt] (map) at (current page.east) {\includegraphics[width=\linewidth]{map}};
  % \fill[white,path fading=nofading] (map.north west) rectangle (map.south east);

  % \iftoggle{Vietnamese}{
    % \node[anchor=south west, inner sep=0pt] (qrEvent_vi) at (map.south west) {\includegraphics[height=3.5cm]{qrEvent_vi}};
  % }{
    % \node[anchor=south west, inner sep=0pt] (qrEvent_en) at (map.south west) {\includegraphics[height=3.5cm]{qrEvent_en}};
  % }

% \end{tikzpicture}

\end{document}