Double check if server is using the four letter language code(en-US, es-ES) or just the two(en, es). Much like The Queen's English (en-GB) verses 'murican (en-US), there are differences between the Spanish (es-ES, es-MX) languages as well.
Most systems will spit out a four letter code for i18n/L10n compliance as it is a user preference. The server should respect the four letter code, and only degrade to two if there is no direct match.
Double check if server is using the four letter language code(en-US, es-ES) or just the two(en, es). Much like The Queen's English (en-GB) verses 'murican (en-US), there are differences between the Spanish (es-ES, es-MX) languages as well.
Most systems will spit out a four letter code for i18n/L10n compliance as it is a user preference. The server should respect the four letter code, and only degrade to two if there is no direct match.