http://www-01.ibm.com/support/docview.wss?uid=swg21573032
Technote (FAQ)
Question
How to change the interface language of CPLEX Optimization Studio IDE?
Answer
By default, CPLEX Optimization Studio IDE will use the language used by your operation system, if the language is supported. If the operating system uses an unsupported language, CPLEX Optimization Studio IDE will use English as the interface language. The choice of IDE interface language is not related to the installer interface language.
To change the interface language of CPLEX Optimization Studio IDE, you need to find the shortcut to the IDE on Start Manu, right click on shortcut, click on properties and add command line option -nl <language_code>. If the path to the target executable file are in quote marks, please add the option out of the quote marks.
On Windows 8/8.1, please right click the icon of CPLEX Studio IDE and select "Open file location". A folder with a shortcut to CPLEX Studio IDE will be opened. Then the shortcut can be edited by right clicking it, selecting properties and adding option -nl <language_code> or -Duser.language=<language_code>.
Now CPLEX Optimization Studio support the following languages:
| Language | Language Code |
| Chinese, Simplified | zh_CN |
| English | en or en_US |
| French | fr |
| German | de |
| Japanese | ja |
| Korean | ko |
| Polish (*) | pl |
| Portuguese, Brazilian (*) | pt_BR |
| Russian (*) | ru |
| Spanish | es |
| Turkish (*) | tr |
Languages marked with * are newly supported since CPLEX Optimization Studio version 12.5.
The following screenshot shows how to configure the shortcut to CPLEX Optimization Studio IDE to start in Simplified Chinese:
Note: If the target has quotation marks ("), please add the option -nl <language_code> outside the quotation marks. Otherwise, you might get an error reported by Windows indicating the target is not valid.
Note2: Some error messages have not yet been localized. Even if you change the interface language, some error messages will still be displayed in English.