Step 1: Click on the Translations button and select Add New Language at the top of the page to add another form language. 

Step 2: Select the language from the pop-up window and then select Next

Step 3: You have the option to either click on the Translate button at the top of the page and an automatic translation from the set default language to the new selected language will appear for each field.  These translations can then be edited in the textboxes.  Alternatively, if you know the translations then you can enter these into the relevant fields.  

Step 4: Once you are happy with the translations, click on Save and this language will be added as an option onto the form. When you a record a new check, for the added in language to appear the user recording the check needs to have this language set as their locale in their profile.