I tried adding custom lang-region set in /sitecore/system/Languages/sitecore/system/Languages but got following error message:
Language: pt and Region: mx
Language: en and Region: mx
Language: es and Region: br
The name "{Language}-{Region}" is not a valid or supported culture identifier.
The name "{Language}-{Region}" is not a valid or supported culture identifier.
basicallyBasically we are going to set up sitecoreSitecore website with 13 regionregions and each region should support 3 languagelanguages (en,es es,pt pt) so I have to add 39 languagelanguages in system/languagesystem/languages.
EX
Example: en
en-mx,es es-mx,pt pt-mx
es-br,es es-br,pt pt-br
en-cl,es es-cl,es es-br
and so on till 39th Language
