Abstract -- The topics of this research cover all phases of the "Information Design" applied to detect and take profit on weak signals in economic intelligence (EI) (or BI: business intelligence). The field of the information design (ID) applies the process of translating complex, unorganized or unstructured data into valuable and meaningful information. The ID's practice requires an interdisciplinary approach which combines skills in graphic design - writing, analysis processing and editing - , human performance technology and human factors. Applied in the context of information system, it allows to end-users to easily detect implicit topics well known as "weak signals" (WS). In our approach to implement the ID, the processes used cover the development of knowledge management (KM) process in the context of the EI. A case study concerning information monitoring on health resources is presented using ID process to outline weak signals. French and American bibliographic database corpora are applied to make the connection to multilingual concepts in health watch process.