Resolves: tdf#114201 Add Plautdietsch [pdt-CA] to language listbox

(cherry picked from commit 01c7c4e1)

Change-Id: Icf2307649858721a7cde38e8fa892fc3cb1ff08c
Reviewed-on: https://gerrit.libreoffice.org/45822Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins <ci@libreoffice.org>

i18nlangtag/source/isolang/isolang.cxx

@@ -669,6 +669,7 @@ static IsoLanguageCountryEntry const aImplIsoLangEntries[] =
     { LANGUAGE_USER_XIBE,                  "sjo", "CN", k0     },
     { LANGUAGE_USER_KITUBA_DRCONGO,        "ktu", "CD", k0     },
     { LANGUAGE_USER_FON,                   "fon", "BJ", k0     },
+    { LANGUAGE_USER_PLAUTDIETSCH,          "pdt", "CA", k0     },
     { LANGUAGE_MULTIPLE,                   "mul", ""  , k0     },    // multiple languages, many languages are used
     { LANGUAGE_UNDETERMINED,               "und", ""  , k0     },    // undetermined language, language cannot be identified
     { LANGUAGE_NONE,                       "zxx", ""  , k0     },    // added to ISO 639-2 on 2006-01-11: Used to declare the absence of linguistic information

include/i18nlangtag/lang.h

@@ -735,6 +735,7 @@ namespace o3tl
 #define LANGUAGE_USER_XIBE                  LanguageType(0x069B)
 #define LANGUAGE_USER_KITUBA_DRCONGO        LanguageType(0x069C)
 #define LANGUAGE_USER_FON                   LanguageType(0x069D)
+#define LANGUAGE_USER_PLAUTDIETSCH          LanguageType(0x069E)
 
 
 /* XXX Add new user defined LCIDs ^^^ there.

svtools/inc/langtab.hrc

@@ -405,7 +405,8 @@ const std::pair<const char*, LanguageType> STR_ARR_SVT_LANGUAGE_TABLE[] =
     { NC_("STR_ARR_SVT_LANGUAGE_TABLE", "Manchu") , LANGUAGE_USER_MANCHU },
     { NC_("STR_ARR_SVT_LANGUAGE_TABLE", "Xibe") , LANGUAGE_USER_XIBE },
     { NC_("STR_ARR_SVT_LANGUAGE_TABLE", "Kituba (Democratic Republic of the Congo)"), LANGUAGE_USER_KITUBA_DRCONGO },
-    { NC_("STR_ARR_SVT_LANGUAGE_TABLE", "Fon"), LANGUAGE_USER_FON }
+    { NC_("STR_ARR_SVT_LANGUAGE_TABLE", "Fon"), LANGUAGE_USER_FON },
+    { NC_("STR_ARR_SVT_LANGUAGE_TABLE", "Plautdietsch"), LANGUAGE_USER_PLAUTDIETSCH }
 };
 
 #endif