In the management of the employees, go to the tab n°6 salary certificate
The language of the certificate concerns the added texts. The certificates themselves are in three languages. (See the printouts here)
Check box 13.1.1 if the conditions defined by the guidelines are met (See official guidelines) as well as the various other boxes
Use the text lines to add additional information. Note: Lines 1 and 2 of the comments are available for selective updating.
Check and complete the information on the tab Standard remarks (the sentence checked for example above will appear in the number 15)