tricks to compile 2 pdf from 1 source file

wedding-invitation/thiep1.tex

@@ -5,19 +5,19 @@
 \usepackage[utf8]{inputenc}
 \usepackage[T1]{fontenc}
 \usepackage{ebgaramond}
+\usepackage{etoolbox}
+
+\newtoggle{Vietnamese}
+
+\ifdefined\ViFlag
+  \toggletrue{Vietnamese}
+\else
+  \togglefalse{Vietnamese}
+\fi
 
 \usetikzlibrary{fadings}
 % \tikzfading[name=fade right, left color=transparent!0, right color=transparent!100]
 % \tikzfading[name=fade in, inner color=transparent!200, outer color=transparent!0]
-
-% \pgfdeclareradialshading{ellipse}{\pgfpoint{50bp}{50bp}}{
-\pgfdeclareradialshading{ellipse}{\pgfpoint{100bp}{100bp}}{
-  color(0bp)=(pgftransparent!100);
-  color(25bp)=(pgftransparent!100);
-  color(50bp)=(pgftransparent!80);
-  color(75bp)=(pgftransparent!00);
-  color(100bp)=(pgftransparent!0)}
-
 \pgfdeclarehorizontalshading{FOne}{100bp} {
   color(0bp)=(pgftransparent!0);
   color(25bp)=(pgftransparent!0);
@@ -31,45 +31,71 @@
 \begin{document}
 \begin{tikzpicture}[overlay,remember picture]
   \node[anchor=east,inner sep=0pt] (pic) at (current page.east)
-  % {\includegraphics[height=\pdfpageheight]{GAO_9361_01}};
   {\includegraphics[height=\pdfpageheight]{027-028}};
-  % \fill[white,path fading=fade right] (pic.north west) rectangle (pic.south east);
   \fill[white,path fading=myfading] (pic.north west) rectangle (pic.south east);
-  % \coordinate (pin) at (12,-2.5);
-  % \filldraw[ultra thick,draw=red,fill=red!50] (pin) -- ++(70:.5) arc (-20:200:.18) -- cycle;
-  % \path (pin) -- ++(0,.5) node[draw,fill,red,circle,inner sep=1pt] {};
-  \node[anchor=south east, inner sep=0pt] (qr) at (pic.south east)
-  {\includegraphics[height=2.8cm]{qr}};
+  \iftoggle{Vietnamese}{
+    \node[anchor=south east, inner sep=0pt] (qrEvent_vi) at (pic.south east)
+    {\includegraphics[height=2.5cm]{qrEvent_vi}};
+  }{
+    \node[anchor=south east, inner sep=0pt] (qrEvent_en) at (pic.south east)
+    {\includegraphics[height=2.5cm]{qrEvent_en}};
+  }
 \end{tikzpicture}%
 
 \obeylines%
-{\addfontfeatures{Scale=2.8,LetterSpace=9} INVITATION}
+{\addfontfeatures{Scale=2.8,LetterSpace=9,Color=red}
+  \iftoggle{Vietnamese}{ THIỆP MỜI }{ INVITATION }}
 
 \bigbreak
 \textit{%
-  Dear friend,
+  \iftoggle{Vietnamese}{
+    Trân trọng kính mời bạn
 
-  We'd love to invite you to our wedding reception.
+    dự tiệc cưới của chúng tôi,
 
-  Sincerly,
+    Nam và Hương.
+  }{
+    Dear friend,
 
-  Nam and Huong
+    We'd love to invite you to our wedding reception.
+
+    Sincerly,
+
+    Nam and Huong.
+  }
 }
 
 \vfill
-{\addfontfeatures{Scale=1.4,LetterSpace=5}\scshape when?}
-\textit{%
-  March 1\/\rlap{,}\textsuperscript{st} 2020
-  4\kern.5pt:\kern.5pt00 pm
-}
-\medbreak
-{\addfontfeatures{Scale=1.4,LetterSpace=5}\scshape where?}
-\textit{%
-  Auco Convention Center,
+  \iftoggle{Vietnamese}{
+    {\addfontfeatures{Scale=1.4,LetterSpace=5,Color=red}\scshape Bao giờ?}
+    \textit{%
+      Chủ Nhật, ngày 1, tháng 3, năm 2020
+      4\kern.5pt:\kern.5pt00 chiều
+    }
+    \medbreak
+    {\addfontfeatures{Scale=1.4,LetterSpace=5,Color=red}\scshape Ở đâu?}
+    \textit{%
+      Trung tâm nhà hàng tiệc cưới Âu Cơ,
 
-  1A Nguyen Huu Cau Str, Ngoc Chau Ward
+      1A Nguyễn Hữu Cầu, Phường Ngọc Châu,
 
-  Hai Duong City, Hai Duong
-}
+      Thành phố Hải Dương, Hải Dương
+    }
+  }{
+    {\addfontfeatures{Scale=1.4,LetterSpace=5,Color=red}\scshape when?}
+    \textit{%
+      March 1\/\rlap{,}\textsuperscript{st} 2020
+      4\kern.5pt:\kern.5pt00 pm
+    }
+    \medbreak
+    {\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
+    }
+  }
 
 \end{document}