Create Lingotek Languages. These languages will be available as options when requesting case comment translation. Create Lingotek Languages for all needed source and target languages.
Request the translation. Go to the case comment and request the translation.
Create a Lingotek Language
To create a Lingotek Language,
Log into Salesforce as an administrator.
From the top menu, open the Lingotek Languagestab.
From the Lingotek Languages tab, click New (button, upper right) and complete the fields.
Lingotek Language Name. Enter the Lingotek Language Name. This is the name that will appear as a menu option when requesting translations. Type something descriptive.
Lingotek Setting. Click the Search icon and select which Lingotek Setting to use when translating this language.
Lingotek Workflow. Click the Search icon and select which Lingotek Workflow to use when translating this language.
Locale / Language / Country. Scroll to select the specific language code to use when translating this language.
Request the Translation
To translate case comments,
Log into Salesforce as an administrator.
From the top menu, open the Cases tab (upper left) and click to open a case.
From the open case, click to select Translate Comments.
In the new window, scroll to set the Source and Target language pairs (created above). Then click Translate.