gnu: Add texlive-tracklang.

* gnu/packages/tex.scm (texlive-tracklang): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/tex.scm

@@ -11185,3 +11185,25 @@ installed modules.  The @code{datetime2-calc} package uses the
 @code{pgfcalendar} package (part of the PGF/TikZ bundle).  This package
 replaces @code{datetime.sty} which is now obsolete.")
     (license license:lppl1.3+)))
+
+(define-public texlive-tracklang
+  (package
+    (inherit
+     (simple-texlive-package
+      "texlive-tracklang"
+      (list "doc/generic/tracklang/"
+            "source/latex/tracklang/"
+            "tex/generic/tracklang/"
+            "tex/latex/tracklang/")
+      (base32 "1386sg25y6zb4ixvrbdv6n1gp54h18mjd984bnwwqda6jafxx4zr")
+      #:trivial? #t))
+    (home-page "https://ctan.org/macros/generic/tracklang")
+    (synopsis "Language and dialect tracker")
+    (description
+     "The @code{tracklang} package is provided for package developers who want a
+simple interface to find out which languages the user has requested through
+packages such as @code{babel} or @code{polyglossia}.  This package does not
+provide any translations!  Its purpose is simply to track which languages have
+been requested by the user.  Generic TeX code is in @code{tracklang.tex} for
+non-LaTeX users.")
+    (license license:lppl1.3+)))