A registry edit will change it.
\\HKLM\HARDWARE\DEFVICEMAP\KYEBD\CurLang
Value 1033 - English - It is default.
Value 1031 - German - I tried it.
strLCID = 1078 ' Afrikaans
Case "sq"
strLCID = 1052 ' Albanian
Case "ar-sa"
strLCID = 1025 ' Arabic(Saudi Arabia)
Case "ar-iq"
strLCID = 2049 ' Arabic(Iraq)
Case "ar-eg"
strLCID = 3073 ' Arabic(Egypt)
Case "ar-ly"
strLCID = 4097 ' Arabic(Libya)
Case "ar-dz"
strLCID = 5121 ' Arabic(Algeria)
Case "ar-ma"
strLCID = 6145 ' Arabic(Morocco)
Case "ar-tn"
strLCID = 7169 ' Arabic(Tunisia)
Case "ar-om"
strLCID = 8193 ' Arabic(Oman)
Case "ar-ye"
strLCID = 9217 ' Arabic(Yemen)
Case "ar-sy"
strLCID = 10241 ' Arabic(Syria)
Case "ar-jo"
strLCID = 11265 ' Arabic(Jordan)
Case "ar-lb"
strLCID = 12289 ' Arabic(Lebanon)
Case "ar-kw"
strLCID = 13313 ' Arabic(Kuwait)
Case "ar-ae"
strLCID = 14337 ' Arabic(U.A.E.)
Case "ar-bh"
strLCID = 15361 ' Arabic(Bahrain)
Case "ar-qa"
strLCID = 16385 ' Arabic(Qatar)
Case "eu"
strLCID = 1069 ' Basque
Case "bg"
strLCID = 1026 ' Bulgarian
Case "be"
strLCID = 1059 ' Belarusian
Case "ca"
strLCID = 1027 ' Catalan
Case "zh-tw"
strLCID = 1028 ' Chinese(Taiwan)
Case "zh-cn"
strLCID = 2052 ' Chinese(PRC)
Case "zh-hk"
strLCID = 3076 ' Chinese(Hong Kong)
Case "zh-sg"
strLCID = 4100 ' Chinese(Singapore)
Case "hr"
strLCID = 1050 ' Croatian
Case "cs"
strLCID = 1029 ' Czech
Case "da"
strLCID = 1030 ' Danish
Case "nl"
strLCID = 1043 ' Dutch(Standard)
Case "nl-be"
strLCID = 2067 ' Dutch(Belgian)
Case "en"
strLCID = 9 ' English
Case "en-us"
strLCID = 1033 ' English(United States)
Case "en-gb"
strLCID = 2057 ' English(British)
Case "en-au"
strLCID = 3081 ' English(Australian)
Case "en-ca"
strLCID = 4105 ' English(Canadian)
Case "en-nz"
strLCID = 5129 ' English(New Zealand)
Case "en-ie"
strLCID = 6153 ' English(Ireland)
Case "en-za"
strLCID = 7177 ' English(South Africa)
Case "en-jm"
strLCID = 8201 ' English(Jamaica)
Case "en-ca"
strLCID = 9225 ' English(Caribbean)"?>
Case "en-bz"
strLCID = 10249 ' English(Belize)
Case "en-tt"
strLCID = 11273 ' English(Trinidad)
Case "et"
strLCID = 1061 ' Estonian
Case "fo"
strLCID = 1080 ' Faeroese
Case "fa"
strLCID = 1065 ' Farsi
Case "fi"
strLCID = 1035 ' Finnish
Case "fr"
strLCID = 1036 ' French(Standard)
Case "fr-be"
strLCID = 2060 ' French(Belgian)
Case "fr-ca"
strLCID = 3084 ' French(Canadian)
Case "fr-ch"
strLCID = 4108 ' French(Swiss)
Case "fr-lu"
strLCID = 5132 ' French(Luxembourg)
Case "mk"
strLCID = 1071 ' Macedonian (FYROM)
Case "gd"
strLCID = 1084 ' Gaelic(Scots)
Case "de"
strLCID = 1031 ' German(Standard)
Case "de-ch"
strLCID = 2055 ' German(Swiss)
Case "de-at"
strLCID = 3079 ' German(Austrian)
Case "de-lu"
strLCID = 4103 ' German(Luxembourg)
Case "de-li"
strLCID = 5127 ' German(Liechtenstein)
Case "el"
strLCID = 1032 ' Greek
Case "he"
strLCID = 1037 ' Hebrew
Case "hi"
strLCID = 1081 ' Hindi
Case "hu"
strLCID = 1038 ' Hungarian
Case "is"
strLCID = 1039 ' Icelandic
Case "in"
strLCID = 1057 ' Indonesian
Case "it"
strLCID = 1040 ' Italian(Standard)
Case "it-ch"
strLCID = 2064 ' Italian(Swiss)
Case "ja"
strLCID = 1041 ' Japanese
Case "ko"
strLCID = 1042 ' Korean
Case "ko"
strLCID = 2066 ' Korean(Johab)
Case "lv"
strLCID = 1062 ' Latvian
Case "lt"
strLCID = 1063 ' Lithuanian
Case "ms"
strLCID = 1086 ' Malaysian
Case "mt"
strLCID = 1082 ' Maltese
Case "no"
strLCID = 1044 ' Norwegian(Bokmal)
Case "no"
strLCID = 2068 ' Norwegian(Nynorsk)
Case "pl"
strLCID = 1045 ' Polish
Case "pt-br"
strLCID = 1046 ' Portuguese(Brazil)
Case "pt"
strLCID = 2070 ' Portuguese(Portugal)
Case "rm"
strLCID = 1047 ' Rhaeto-Romanic
Case "ro"
strLCID = 1048 ' Romanian
Case "ro-mo"
strLCID = 2072 ' Romanian(Moldavia)
Case "ru"
strLCID = 1049 ' Russian
Case "ru-mo"
strLCID = 2073 ' Russian(Moldavia)
Case "sz"
strLCID = 1083 ' Sami(Lappish)
Case "sr"
strLCID = 3098 ' Serbian(Cyrillic)
Case "sr"
strLCID = 2074 ' Serbian(Latin)
Case "sk"
strLCID = 1051 ' Slovak
Case "sl"
strLCID = 1060 ' Slovenian
Case "sb"
strLCID = 1070 ' Sorbian
Case "es"
strLCID = 1034 ' Spanish(Spain - Traditional Sort)
Case "es-mx"
strLCID = 2058 ' Spanish(Mexican) This is probably the one you want!
Case "es-gt"
strLCID = 4106 ' Spanish(Guatemala)
Case "es-cr"
strLCID = 5130 ' Spanish(Costa Rica)
Case "es-pa"
strLCID = 6154 ' Spanish(Panama)
Case "es-do"
strLCID = 7178 ' Spanish(Dominican Republic)
Case "es-ve"
strLCID = 8202 ' Spanish(Venezuela)
Case "es-co"
strLCID = 9226 ' Spanish(Colombia)
Case "es-pe"
strLCID = 10250 ' Spanish(Peru)
Case "es-ar"
strLCID = 11274 ' Spanish(Argentina)
Case "es-ec"
strLCID = 12298 ' Spanish(Ecuador)
Case "es-c"
strLCID = 13322 ' Spanish(Chile)
Case "es-uy"
strLCID = 14346 ' Spanish(Uruguay)
Case "es-py"
strLCID = 15370 ' Spanish(Paraguay)
Case "es-bo"
strLCID = 16394 ' Spanish(Bolivia)
Case "es-sv"
strLCID = 17418 ' Spanish(El Salvador)
Case "es-hn"
strLCID = 18442 ' Spanish(Honduras)
Case "es-ni"
strLCID = 19466 ' Spanish(Nicaragua)
Case "es-pr"
strLCID = 20490 ' Spanish(Puerto Rico)
Case "sx"
strLCID = 1072 ' Sutu
Case "sv"
strLCID = 1053 ' Swedish
Case "sv-fi"
strLCID = 2077 ' Swedish(Finland)
Case "th"
strLCID = 1054 ' Thai
Case "ts"
strLCID = 1073 ' Tsonga
Case "tn"
strLCID = 1074 ' Tswana
Case "tr"
strLCID = 1055 ' Turkish
Case "uk"
strLCID = 1058 ' Ukrainian
Case "ur"
strLCID = 1056 ' Urdu
Case "ve"
strLCID = 1075 ' Venda
Case "vi"
strLCID = 1066 ' Vietnamese
Case "xh"
strLCID = 1076 ' Xhosa
Case "ji"
strLCID = 1085 ' Yiddish
Case "zu"
strLCID = 1077 ' Zulu