The adjective belga - meaning Belgian - can be confusing, because it functions differently from other words used to describe nationality, such as:

• italiano, italiana / italiani, italiane (Italian)

• americano, americana / americani, americane (American)

• russo, russa / russi, russe (Russian)

• spagnolo, spagnola / spagnoli, spagnole (Spanish)

• brasiliano, brasiliana / brasiliani, brasiliane (Brazilian)

The adjective belga is both the masculine and feminine form. This adjective also has an irregular masculine plural:

• belgi 
  (not belghi)

The forms of belga are:

• belga (m. and f.singular)

• belgi (m. plural)

• belghe (f. plural)