As a first choice we suggest you contact your host organization. It may provide language courses for its international guests.
  

In Trieste you can refer to:

Centro linguistico di Ateneo (CLA) - University of Trieste organises paid Italian language courses provided a minimum number of registrations is reached.
For more information please contact: cla@units.it or click here.

Comitato territoriale Arci Trieste APS organises free Italian language courses at Biblioteca Quarantotti Gambini, in via delle Lodole 6. You can reach Biblioteca with bus 1 and 10 (Campo San Giacomo stop). Courses are usually held in the evening. The pre-registration is mandatory. For more information: mobile Phone +39 339 8640417; e-mail: corsi.italiano.ts@gmail.com. 

SISSA Club organises Italian language courses (all levels) opened also to researchers and scientific staff of other Institutions. Courses could be online or live in SISSA. For more information: https://club.sissa.it/