The ArcGIS Enterprise Amazon Machine Images (AMIs) are built on top of Amazon-provided AMIs that have the operating system language set to English.
You can optionally change the language of the operating system and install additional language packs to localize ArcGIS. In a multiple-machine site, you would do this on the site server machine. In most cases you would not need to log in to the additional GIS server instances, so localizing them would be unnecessary.
Operating system languages provided with the AMI
The ArcGIS Enterprise AMIs have several operating system language packs preinstalled by Amazon. The preinstalled languages are English, German, Spanish, French, Italian, Chinese (Simplified), Chinese (Traditional), Korean, Japanese.
Install additional operating system languages
If the operating system language you want to use is not included on the AMI, you can download and install the language pack from Microsoft.
Install ArcGIS language packs
ArcGIS language packs are available for ArcGIS Server and ArcGIS Desktop within a few months of the initial product release in English. Available languages vary by component.
You can download these language packs onto your EC2 instance from My Esri.
The Portal for ArcGIS installation includes language-specific resources that allow you to localize the portal website interface; you do not need to install an additional language pack for Portal for ArcGIS.
Change the operating system language
Once your language packs are installed for ArcGIS Server and ArcGIS Desktop, change the language of the operating system. If you need instructions for this, see the documentation from your operating system provider.
The language displayed by each software component
ArcGIS Server Manager and the Services Directory use the language set for your web browser. After you install the language pack for ArcGIS Server and change the operating system language, set the language for your browser.
After Portal for ArcGIS is installed, the portal administrator configures the language for the portal website. However; individual members of the organization can customize their profiles to display the portal website in the language of their choosing.
After installing a language pack, ArcGIS Desktop should immediately honor the display language you set for the operating system.