Error messages from an answer at https://tex.stackexchange.com/questions/512584/arabic-alphabet-urdu-language-to-latex

----------------

XeLaTeX error message:

This is XeTeX, Version 3.14159265-2.6-0.999991 (MiKTeX 2.9.7200 64-bit)
entering extended mode
(javierbezos.tex
LaTeX2e <2019-10-01> patch level 1
("C:\Program Files\MiKTeX 2.9\tex/latex/base\article.cls"
Document Class: article 2019/08/27 v1.4j Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex/latex/base\size10.clo"))
("C:\Program Files\MiKTeX 2.9\tex/generic/babel\babel.sty"
("C:\Program Files\MiKTeX 2.9\tex/generic/babel\switch.def")
*************************************
* Local config file bblopts.cfg used
*
("C:\Program Files\MiKTeX 2.9\tex/latex/arabi\bblopts.cfg")
("C:\Program Files\MiKTeX 2.9\tex/latex/babel-english\english.ldf"
("C:\Program Files\MiKTeX 2.9\tex/generic/babel\babel.def"
("C:\Program Files\MiKTeX 2.9\tex/generic/babel\xebabel.def"
("C:\Program Files\MiKTeX 2.9\tex/generic/babel\txtbabel.def")))))
("C:\Program Files\MiKTeX 2.9\tex/latex/fontspec\fontspec.sty"
("C:\Program Files\MiKTeX 2.9\tex/latex/l3packages/xparse\xparse.sty"
("C:\Program Files\MiKTeX 2.9\tex/latex/l3kernel\expl3.sty"
("C:\Program Files\MiKTeX 2.9\tex/latex/l3kernel\expl3-code.tex"
("C:\Program Files\MiKTeX 2.9\tex/latex/l3kernel\l3deprecation.def"))
("C:\Program Files\MiKTeX 2.9\tex/latex/l3backend\l3backend-xdvipdfmx.def")))
("C:\Program Files\MiKTeX 2.9\tex/latex/fontspec\fontspec-xetex.sty"
("C:\Program Files\MiKTeX 2.9\tex/latex/base\fontenc.sty"
("C:\Program Files\MiKTeX 2.9\tex/latex/base\tuenc.def"))
("C:\Program Files\MiKTeX 2.9\tex/latex/fontspec\fontspec.cfg")))
("C:\Program Files\MiKTeX 2.9\tex/generic/babel/locale/en\babel-english.tex")
(javierbezos.aux)

Package babel Warning: The following fonts are not babel standard families:
(babel)                * \rmfamily  / lmr
(babel)                  "[lmroman10-regular]:mapping=tex-text;" at 10.0pt
(babel)                * \sffamily  / lmss
(babel)                  "[lmsans10-regular]:mapping=tex-text;" at 10.0pt
(babel)                * \ttfamily  / lmtt
(babel)                  "[lmmono10-regular]:" at 10.0pt
(babel)                There is nothing intrinsically wrong with it, but
(babel)                'babel' will no set Script and Language. Consider
(babel)                defining a new family with \babelfont.
(babel)                Reported on input line 21.


! Package babel Error: You haven't defined the language urdu yet.

See the babel package documentation for explanation.
Type  H <return>  for immediate help.
 ...

l.33 ... must be either \foreignlanguage{urdu}{کا}
                                                  , or
?

----------------

LuaLaTex error message:

This is LuaTeX, Version 1.10.0 (MiKTeX 2.9.7200 64-bit)
 restricted system commands enabled.
(./javierbezos.tex
LaTeX2e <2019-10-01> patch level 1

luaotfload | main : initialization completed in 1.729 seconds
("C:/Program Files/MiKTeX 2.9/tex/latex/base/article.cls"
Document Class: article 2019/08/27 v1.4j Standard LaTeX document class
("C:/Program Files/MiKTeX 2.9/tex/latex/base/size10.clo"
luaotfload | db : Font names database not found, generating new one.
luaotfload | db : This can take several minutes; please be patient.))
("C:/Program Files/MiKTeX 2.9/tex/generic/babel/babel.sty"
("C:/Program Files/MiKTeX 2.9/tex/generic/babel/switch.def")
("C:/Program Files/MiKTeX 2.9/tex/generic/babel/luababel.def")
*************************************
* Local config file bblopts.cfg used
*
("C:/Program Files/MiKTeX 2.9/tex/latex/arabi/bblopts.cfg")
("C:/Program Files/MiKTeX 2.9/tex/latex/babel-english/english.ldf"
("C:/Program Files/MiKTeX 2.9/tex/generic/babel/babel.def"
("C:/Program Files/MiKTeX 2.9/tex/generic/babel/luababel.def"))))
("C:/Program Files/MiKTeX 2.9/tex/latex/fontspec/fontspec.sty"
("C:/Program Files/MiKTeX 2.9/tex/latex/l3packages/xparse/xparse.sty"
("C:/Program Files/MiKTeX 2.9/tex/latex/l3kernel/expl3.sty"
("C:/Program Files/MiKTeX 2.9/tex/latex/l3kernel/expl3-code.tex"
("C:/Program Files/MiKTeX 2.9/tex/latex/l3kernel/l3deprecation.def"))
("C:/Program Files/MiKTeX 2.9/tex/latex/l3backend/l3backend-pdfmode.def")))
("C:/Program Files/MiKTeX 2.9/tex/latex/fontspec/fontspec-luatex.sty"
("C:/Program Files/MiKTeX 2.9/tex/latex/base/fontenc.sty"
("C:/Program Files/MiKTeX 2.9/tex/latex/base/tuenc.def"))
("C:/Program Files/MiKTeX 2.9/tex/latex/fontspec/fontspec.cfg")))
("C:/Program Files/MiKTeX 2.9/tex/generic/babel/locale/en/babel-english.tex")
(./javierbezos.aux)

Package babel Warning: The following fonts are not babel standard families:
(babel)                * \rmfamily  / lmr
(babel)                  [lmroman10-regular]:+tlig;
(babel)                * \sffamily  / lmss
(babel)                  [lmsans10-regular]:+tlig;
(babel)                * \ttfamily  / lmtt
(babel)                  [lmmono10-regular]:
(babel)                There is nothing intrinsically wrong with it, but
(babel)                'babel' will no set Script and Language. Consider
(babel)                defining a new family with \babelfont.
(babel)                Reported on input line 21.


! Package babel Error: You haven't defined the language urdu yet.

See the babel package documentation for explanation.
Type  H <return>  for immediate help.
 ...

l.33 ... must be either \foreignlanguage{urdu}{کا}
                                                  , or
?