6.2.10 EE GA1, 6.2.X EE, 7.0.0 M3
Cannot add new structure to a site when the site's default language differs from the portal's default language
1. Unzip a Liferay 6.2 EE SP6
2. Create a new site
3. Change default language for the Site to (for example) German and available languages to German only (Site Settings->Display settings). Thus, the newly created site should only support the language German.
4. Try to add a new structure -> Will fail with message "Please enter a valid name". Also, default language for the structure fields will be set to English, although site has been set to only support German.
Reproduced on 6.2.x and on master.
LPE-12696 Cannot add new structure to a site when the site's default language differs from the portal's default language